Malicious PDF — malware analysis report

Static analysis result for SHA-256 96fbdaf092eb9bba…

MALICIOUS

PDF

74.2 KB Created: 2021-03-24 07:21:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 1a6138489f1fb57274e3983f3ae4ea99 SHA-1: 4638032f16b4c9b553ab10f7fa978048c1285ac1 SHA-256: 96fbdaf092eb9bba86dff6491fd503044865b0498524ca70ac47b115bdc9a62b
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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 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://druttle.ru/123?utm_term=background+video+song++djpunjab PDF link annotation
    • http://strongcreditscore.info/nexisurexamugepupisiz20y80.pdfIn PDF document text
    • https://fekobuwag.weebly.com/uploads/1/3/1/8/131858403/43127a15443.pdfIn PDF document text
    • http://cucoupon.info/893023428701t6u8.pdfIn PDF document text
    • http://canonsburglake.com/588324333862ay9g.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4484990/normal_5fc862240f408.pdfIn PDF document text
    • https://xisulufi.weebly.com/uploads/1/3/4/8/134870666/jumawa.pdfIn PDF document text
    • http://eslife.pro/gopironexumuziponevilemiipa3.pdfIn PDF document text
    • https://degemojo.weebly.com/uploads/1/3/1/4/131407655/aaf43b8bed963.pdfIn PDF document text
    • http://zabavnyi-slon.ru/how_to_test_ecu_on_motorcycle17cdq.pdfIn PDF document text
    • http://hookup157.site/euro_truck_evolution_simulator_mod_apk_v3._1de47j.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4491153/normal_5fe36c0e32a22.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392470/normal_601d6fed62709.pdfIn PDF document text
    • http://mowuvivof.22web.org/how_to_clean_whirlpool_quiet_partner_2.pdfIn PDF document text
    • https://lobubanir.weebly.com/uploads/1/3/2/8/132814664/3946618.pdfIn PDF document text
    • https://worijuxadije.weebly.com/uploads/1/3/4/8/134863955/9f57f86164d66.pdfIn PDF document text
    • http://keto-menu.online/reading_comprehension_test_for_grade_4xvm44.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://barelog.epizy.com/75482224494.pdfIn PDF document text
    • https://s3.amazonaws.com/vuterijoze/transformers_4_bumblebee.pdfIn PDF document text
    • http://tomosuromiv.epizy.com/do_all_lg_phones_use_the_same_charger.pdfIn PDF document text
    • https://s3.amazonaws.com/tiniruru/fosomewewokole.pdfIn PDF document text
    • https://s3.amazonaws.com/forupokisip/pawan_raja_film_song.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cda9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDA9 5596 bytes
SHA-256: 71ce1784af9e07f4d1b3f13c932de4ff94f7c34f66367a6b228cfc5b36a3cedf
font_01_sfnt_off0000e0cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0CB 10384 bytes
SHA-256: 2a9b45673210fb6d63594669368eee455dddd720d2f0cecb13dbf7832360af28
font_02_sfnt_off00010476.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10476 16140 bytes
SHA-256: 5bfda07072dd2e1b0df7f1680a75ba616774ec51e1a09c257f000ba239241e1c

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