Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad3f28a1f4640c60…

MALICIOUS

PDF

82.2 KB Created: 2021-03-19 06:24:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 5a1bd7395aeb946de19e68c952a556bc SHA-1: 32617e5bcc85b4c6ab46c733856e495691e8af99 SHA-256: ad3f28a1f4640c6052a6ed60a81e61aa6574f3526413f5b5cb958c60bf0fbbf6
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, many of which are SEO-farmed or lead to unknown domains, suggesting a link-farming or phishing campaign. The ClamAV detection and ML classifier strongly indicate malicious intent. While no scripts were directly extracted, the PDF structure and embedded URLs are indicative of a malicious document designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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 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.
  • 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://golowaki.ru/award?keyword=blender+text+animation+tutorial+pdf PDF link annotation
    • http://saveyoutubebot.com/taco_bell_hard_shell_beef_taco_nutritionp977l.pdfIn PDF document text
    • http://topcreditmonitoring.info/how_to_turn_on_ringer_on_cordless_phoneyqoi4.pdfIn PDF document text
    • http://souve.me/zombie_survival_guide_moviedk099.pdfIn PDF document text
    • http://makedctl.site/gamifuromeronjiyq.pdfIn PDF document text
    • http://tb-films.ru/wolverine_f2d_titan_film__negative_scanner_review8uizd.pdfIn PDF document text
    • http://ig-soft-team.com/7978043330o31zu.pdfIn PDF document text
    • http://zootime.store/sc_dmv_driving_test_in_spanishjj9su.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://6f46ab72-b8e3-4ec2-8f01-cb5d6491dab7.filesusr.com/ugd/9a120b_aa93cd6c2e1940a88e0b2fc7c4a95f4e.pdf?index=trueIn PDF document text
    • https://8909b315-4d59-4940-aabf-0fdaa532e0ad.filesusr.com/ugd/4542d9_ee8a79ee96434c74aeb7dbbc8029a770.pdf?index=trueIn PDF document text
    • https://9e2bb560-353e-4f5d-a08b-1363560edab4.filesusr.com/ugd/6c032c_1604efedbbd74bb789956c275bb939d6.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zamuriza/free_animated_powerpoint_templates_free_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/jivuxo/giteseboxadugowo.pdfIn PDF document text
    • https://0491f86b-060d-4f4a-be23-b0d01488777f.filesusr.com/ugd/faa7ef_de4f1ed05ccb4d4396938a745020dab1.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/vonutavekip/crystal_auto_typer_software_free.pdfIn PDF document text
    • https://s3.amazonaws.com/pewebopufupe/nazeg.pdfIn PDF document text
    • https://s3.amazonaws.com/pubopelej/aspect_ratio_of_image_in_android.pdfIn PDF document text
    • https://9e730ba1-499c-413e-9a09-8a81f8121270.filesusr.com/ugd/0a0016_ab6e31eb4e2b44d99966c50c632c8698.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/nokiva/11516760743.pdfIn PDF document text
    • https://9ec55029-67b1-4fe0-9a5d-40fd638ac594.filesusr.com/ugd/dc5a51_c4aa6177f8fb435cb645d833f64ae883.pdf?index=trueIn PDF document text
    • https://cd489911-dc6d-4439-b408-84622343fb93.filesusr.com/ugd/d8e941_e4805e7c7fc447c18c6a6f5ebe15633d.pdf?index=trueIn PDF document text
    • https://78fc25e8-d533-4ec3-a480-3617e8cc0d4b.filesusr.com/ugd/aa5866_bcd837f6a7ba4038bd56d05ec80e8247.pdf?index=trueIn PDF document text
    • https://94aa8f26-b07a-4c24-bdb4-4112657565c9.filesusr.com/ugd/37428b_cf5a6d4f9c5d4f4b9528da5918fdffe4.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wixamupelinere/83431316468.pdfIn PDF document text
    • https://s3.amazonaws.com/toguvaju/are_there_really_missing_books_of_the_bible.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f83c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF83C 5008 bytes
SHA-256: 8c9c2c3ea5ed84dfcf67d1f12749bcac55c721ad1fb8b309890cf771808f268a
font_01_sfnt_off0001092c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1092C 10520 bytes
SHA-256: ef2f01ad9735314fcdafe3b99718385e11367ded3bf7cf293cef77da0cb0e013
font_02_sfnt_off00012cf7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12CF7 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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