Malicious PDF — malware analysis report

Static analysis result for SHA-256 9157c02dca2f2ba1…

MALICIOUS

PDF

70.0 KB Created: 2021-03-14 07:00:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b5670690082699250d6d4eb1e9ad388f SHA-1: ef27496d7e05e820e7eeddc6a69c0c14b45baba2 SHA-256: 9157c02dca2f2ba130e34df4434e9dbf7ae77cb800c139f5f94c8e407cad9701
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many pointing to disposable domains, suggesting a phishing or link-farming attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs are consistent with a phishing lure designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://seumenha.ru/wix?keyword=bestine+near+me
    • http://wulutano.mywebcommunity.org/what_foods_are_not_allowed_on_fodmap_diet.pdf
    • https://cdn.sqhk.co/sesijisova/jhf4Vgd/libikufakoterepod.pdf
    • http://terugate.mypressonline.com/simone_de_beauvoir_the_second_sex_quotes.pdf
    • https://cdn.sqhk.co/pajubopolak/jdijzYa/all_video_player_hd_apk_download.pdf
    • http://torixewiser.medianewsonline.com/amidalin_pastilha_bula.pdf
    • http://busimaderule.mywebcommunity.org/ganigoboxopezubawiw.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/1842f8c3-f534-46b9-a948-a262de1561dc/georgia_drivers_license_requirements_for_21_year_olds.pdf
    • https://a815f367-2516-4b88-9496-eed07d5c1eb7.filesusr.com/ugd/665c20_ae05ecc1bb33444db80aef724b92d081.pdf?index=true
    • http://luvetux.myartsonline.com/9764229075.pdf
    • https://s3.amazonaws.com/dumupa/caremark_prior_auth_form_for_adderall.pdf
    • https://s3.amazonaws.com/rodigapigeta/how_much_horsepower_does_a_gy6_have.pdf
    • https://5e20aa6b-77ef-4f11-9344-5454fb7c649c.filesusr.com/ugd/fb3aa9_d8040a48812944b38c1b6cb8823fb489.pdf?index=true
    • https://58960a86-a3f4-42d8-866e-ee2cf32068b1.filesusr.com/ugd/1ad962_17d95e8d78b94bd3b4128f65df0281a8.pdf?index=true
    • https://c2267750-1f6d-4c2f-944a-eb302c7f07d7.filesusr.com/ugd/93971e_e43e5b7fb3cc441093b4b9c6be0a801e.pdf?index=true
    • http://jafixomedimun.onlinewebshop.net/ruger_lc9_magazine_finger_extension.pdf
    • https://4253c66a-660d-4c83-b31d-f715833d547b.filesusr.com/ugd/d9e9a0_24e6192c47eb4c3fa0c0a53e227d75d3.pdf?index=true
    • https://uploads.strikinglycdn.com/files/d90ece93-4fb1-4053-bdf4-f79cdb1ea8f6/ridgid_miter_saw_utility_vehicle_manual.pdf
    • https://uploads.strikinglycdn.com/files/14eb35f9-630c-4f02-8c0d-327930ea4ae8/which_roku_is_best_for_sling_tv.pdf
    • http://zerowegujij.onlinewebshop.net/76256983442.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cb4c.bin
b68bf8a9200946fb963b5f31ade79638222d5ddd1ec6498e834956033c96b591		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCB4C 4524 bytes
font_01_sfnt_off0000da79.bin
f68d677d663a85493add4888f1cf444e3946a67f64a258a8dd7a36453c1d53da		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDA79 9932 bytes
font_02_sfnt_off0000fc63.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFC63 4324 bytes

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