Malicious PDF — malware analysis report

Static analysis result for SHA-256 b1618dbe71f46539…

MALICIOUS

PDF

100.7 KB Created: 2021-03-06 06:10:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 1561101f4fa367dcd4429ae8cbd0934f SHA-1: bce5dfba7c29c31e7d3bfebf2766bfc96b781639 SHA-256: b1618dbe71f4653908f05d56a43ddc731b744a7d5a9460363853173d5a3b0c04
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document contains a large number of external links, identified as a link farm. The primary URL, https://baarspo.ru/strik?utm_term=solution+set+meaning+definition, suggests a potential phishing or SEO manipulation attempt. While no scripts were explicitly extracted, the PDF structure and the heuristic firings indicate malicious intent, likely related to directing users to malicious or deceptive content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9805

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://baarspo.ru/strik?utm_term=solution+set+meaning+definition PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4368949/normal_5fde74b253ddd.pdfIn PDF document text
    • http://scoretdho.best/vibigamidodesalefaxapqjdn.pdfIn PDF document text
    • https://texoxarisozitew.weebly.com/uploads/1/3/0/9/130969357/mosonax_pulodujanos_kozawedajapujup_sogejim.pdfIn PDF document text
    • http://kinorio5.xyz/alteryx_certification_exam_answerscxd8c.pdfIn PDF document text
    • https://gimituwemowi.weebly.com/uploads/1/3/4/8/134872285/7bb59c57.pdfIn PDF document text
    • https://rijojuno.weebly.com/uploads/1/3/5/3/135310883/basamoretekaw.pdfIn PDF document text
    • https://tosoremekik.weebly.com/uploads/1/3/4/7/134771766/336df5e0f6d2.pdfIn PDF document text
    • http://migriruy.ru/how_to_use_the_clean_washer_cycle_on_electroluxbzgn4.pdfIn PDF document text
    • https://raxuremaxu.weebly.com/uploads/1/3/5/3/135350699/topemo_juvolov.pdfIn PDF document text
    • http://vixegoxufareka.getenjoyment.net/ps3_emulator_pc_metal_gear_solid_4.pdfIn PDF document text
    • https://texoxarisozitew.weebly.com/uploads/1/3/0/9/130969357/e8840b2d196cc.pdfIn PDF document text
    • http://vobafoselalulor.mypressonline.com/buposovifolixaw.pdfIn PDF document text
    • http://manthoughtswebsite.website/attendance_allowance_forms_phone_numbergmxdy.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491432/normal_601b7ed1ea473.pdfIn PDF document text
    • https://wanusasa.weebly.com/uploads/1/3/1/0/131070791/duwibawuvalojuw.pdfIn PDF document text
    • http://3gusevshop.website/9822711338c8u6i.pdfIn PDF document text
    • https://kenazago.weebly.com/uploads/1/3/1/0/131070597/jesifofavotepom.pdfIn PDF document text
    • https://turamidiwirak.weebly.com/uploads/1/3/4/3/134340523/piwiko_paduneralijemo_jenalo_defekopiba.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490141/normal_601fc5b508b7a.pdfIn PDF document text
    • https://sepetumeba.weebly.com/uploads/1/3/4/6/134601334/pijusife-pexudokipunisi-xitimuxawojemir.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://xurosuforudev.atwebpages.com/how_to_find_a_person_by_picture_on_google.pdfIn PDF document text
    • http://sagoralezerelo.onlinewebshop.net/dulutixozemilixaregegemom.pdfIn PDF document text
    • http://kepofif.onlinewebshop.net/peak_jump_starter_300_wont_stop_beeping.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 8

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000de34.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE34 5164 bytes
SHA-256: 9f8bb71090be397bcef6dc0b108dad443a4ce800cb064e3c3b3e7aab3e7e78cf
font_01_sfnt_off0000f053.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF053 5116 bytes
SHA-256: 98a6060f58ce04a527484ecdfc2d1710ddf9e0fdd6a8348368937bff38212a02
font_02_sfnt_off0001019b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1019B 3484 bytes
SHA-256: 64938b705e93ff49d16ad8cb07aaab4768164532e14afc89c025308b86ed1bfb
font_03_sfnt_off00010e9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E9D 4680 bytes
SHA-256: c1774b10ab1990819c45d8ca73efd1bf0a4b951261747e2e38baedc4297c73ef
font_04_sfnt_off00011dbc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DBC 15136 bytes
SHA-256: 88bd4afe20dd947b080738b577d23990a395a0d6cb6b4f955c0cbc836dadde76
font_05_sfnt_off00014c5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14C5D 17400 bytes
SHA-256: 5da9e43eae41270cdcd0cb1447afa750dd70e61b027cb4559fd35fb7c3eae823
font_06_sfnt_off000165d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x165D0 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3
font_07_sfnt_off000173d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x173D1 3328 bytes
SHA-256: 6686517c7a482a2abbe96c759281f1900586da8cc6e3afd5c7c520afe25465bd

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