Malicious PDF — malware analysis report

Static analysis result for SHA-256 c290330735d4b26a…

MALICIOUS

PDF

87.1 KB Created: 2021-03-19 04:15:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 0d1ac493aa4cdbdc99651f2832ad442a SHA-1: b82222001b393e3ac9f081fa5fb091ad356f839f SHA-256: c290330735d4b26abb2f4b317b43af8e128de588fd66bf96d9031960887d4932
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains a large number of external links, many pointing to disposable domains, suggesting a link farm or SEO manipulation tactic. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. No scripts were extracted, but the embedded URLs are the primary indicators of compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://druttle.ru/strik?utm_term=song+of+solomon+8+meaning PDF link annotation
    • http://novazeku.mygamesonline.org/ielts_speaking_cue_cards_2020_with_answers.pdfIn PDF document text
    • http://warokibujiz.getenjoyment.net/bordereau_d_envoi_exemple.pdfIn PDF document text
    • http://gepavozo.mygamesonline.org/how_to_change_the_time_on_a_citizen_eco_drive_radio_controlled_watch.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/18139c3e-9819-483b-8dc2-1ef6d5e6a961/ged_practice_test_free_math.pdfIn PDF document text
    • http://kipafiperugava.epizy.com/nebuwulaza.pdfIn PDF document text
    • https://f867c6cd-7aae-4938-a634-6821dcb48262.filesusr.com/ugd/eb45fa_2e720c6bd06f4a0f9690018628edcab2.pdf?index=trueIn PDF document text
    • http://fasorevurug.rf.gd/7877224535.pdfIn PDF document text
    • https://9f9bd9fa-00fe-4673-b34e-9a629881f524.filesusr.com/ugd/09273f_3e663121f5014b27ac4d450553b869ed.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/dc1bdb2a-9974-4d53-a31a-a5cf627f6d5e/educational_research_quantitative_qualitative_and_mixed_approaches_5th_edition.pdfIn PDF document text
    • https://8964868a-aef6-4da0-9a9b-29de7c28e0c5.filesusr.com/ugd/b910ae_138e6bcea2434ebb9387e90f17d5df04.pdf?index=trueIn PDF document text
    • https://42190e62-4dca-482d-a077-ae7b222d7779.filesusr.com/ugd/b91392_101b4654e7e04d66b0cb0ff28a1acf38.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/04df12b3-c977-4ab3-9f8c-ee2ef14c222c/41093273275.pdfIn PDF document text
    • https://8ed7b8cb-9bae-4def-ad9b-66b28cd11f91.filesusr.com/ugd/740d8c_73d95adfbe3a4528992992ad9cbd6bc0.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/aef5db9a-b800-4d98-a184-a02c7380caf4/captain_underpants_books_author.pdfIn PDF document text
    • https://73e25548-3913-4bbb-aa69-a1b25f69568d.filesusr.com/ugd/cece23_b3976baf87d54dde87059841d67321a5.pdf?index=trueIn PDF document text
    • https://55d63786-14d6-44de-84d0-33f1fb383c44.filesusr.com/ugd/45fd81_9b7e0497a8fd4f75b39d3e501ad99326.pdf?index=trueIn PDF document text
    • https://d90bda3b-35dd-409f-9d4b-b4a00d881a52.filesusr.com/ugd/b88e3d_2b47dbe983844b1484dc4369165da8c6.pdf?index=trueIn PDF document text
    • http://wavudipikudela.epizy.com/64048457076.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2cae44e2-1945-4b5f-8e73-5ac4f62a0dbd/dopijijokajam.pdfIn PDF document text
    • http://buwotozan.epizy.com/animation_for_beginners_course.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

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ef86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF86 5288 bytes
SHA-256: 76b0836c5bc926063ec29078a9d8825eb24a34c2410cb2c3ce14b03daf06ef08
font_01_sfnt_off00010172.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10172 4564 bytes
SHA-256: 3c1e10d2a449d65f16dbc6504515718aafe2b917d76683da61b54361652c0700
font_02_sfnt_off000112ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112AD 11660 bytes
SHA-256: e0b89786366d011e9c3be275cae8660a05a244827c577048ab704f27201e3842
font_03_sfnt_off00013a2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13A2A 16036 bytes
SHA-256: 9559dd1bd908241551916101fda3d445a26f5c4b506a1423f23393456f9d5940

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