Malicious PDF — malware analysis report

Static analysis result for SHA-256 130e1621fc82fc8f…

MALICIOUS

PDF

135.8 KB Created: 2021-04-04 21:12:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0939199500de3c3d26d069f9b410fcda SHA-1: 2f542d3399d6470c23026565e057357f53197df6 SHA-256: 130e1621fc82fc8f3117892153ab0f0caea75b15bd391265739f8783e24abd14
246 Risk Score

Malware Insights

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

This PDF document exhibits characteristics of an advance-fee scam, including language related to prizes, funds, and parcel delivery. It also contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to redirect users to malicious sites. The presence of a callback lure further indicates a phishing or tech-support scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 8

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://vilenefex.ru/123?utm_term=java+7.+161
    • https://surarapumo.weebly.com/uploads/1/3/4/3/134305151/fevufinuxozux-jokumek-fudotulexotaluw.pdf
    • https://cdn.sqhk.co/vuxijavapul/jjeheif/among_us_wallpapers_phone.pdf
    • https://cdn-cms.f-static.net/uploads/4471710/normal_60582a3e5a48b.pdf
    • http://vebuwovivulab.mygamesonline.org/gekokomelu.pdf
    • https://static.s123-cdn-static.com/uploads/4366969/normal_5fcf059d779bb.pdf
    • http://xoxapepagaxon.mypressonline.com/mutawuzapajubigig.pdf
    • http://lnstagramverifiedbadge-media.com/66257482894epaiy.pdf
    • http://italia-doc.space/hp_officejet_4500_printer_driver_for_windows_10_64_bit2mttm.pdf
    • http://goodsun.fun/creeped_out_parents_guideushti.pdf
    • http://tcerkovniekupola.space/baweninoguwutobogizezwo14.pdf
    • http://itawomen.fun/uninstall_bloatware_android_tvkjlil.pdf
    • https://cdn-cms.f-static.net/uploads/4467032/normal_600a86ba26b92.pdf
    • https://cdn.sqhk.co/xemugugafot/hchejao/uba_u_mobile_apk_download.pdf
    • https://kibipevanisimak.weebly.com/uploads/1/3/4/7/134770361/dosimodob_wavuxivubene_rajolidirem_rosabalu.pdf
    • https://cdn-cms.f-static.net/uploads/4486199/normal_5fe90bcbd0c72.pdf
    • http://zomoxoxuriw.mypressonline.com/36855305491.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://a519209a-2b0a-481f-9fe9-460c873bdc80.filesusr.com/ugd/270e53_981481ac1f75441fa9f537019afbb84e.pdf?index=true
    • https://95a57b4d-a24c-4412-bd87-88f4f885d252.filesusr.com/ugd/011e4b_8eaadcacc7764f89bb36e7bd4708cb3d.pdf?index=true
    • https://9db8f275-5044-409a-aa1b-3306d9dda9bd.filesusr.com/ugd/361f4b_bfa6ea5767624afe8b755d94d61bd9ec.pdf?index=true
    • http://sudexixurijaxoz.atwebpages.com/aspectos_psicosociales_del_embarazo_en_la_adolescencia.pdf
    • https://11210a16-d5d1-4e17-93a3-27fbbb12f21b.filesusr.com/ugd/fb658e_e7caa03881604b558fdb31d382ce29c2.pdf?index=true
    • https://5b3500e9-40b4-440a-9ada-171ed8bcf4c9.filesusr.com/ugd/7820d0_1ff11ab931264eedb41ed910d592db9a.pdf?index=true
    • 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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001d86b.bin
8447920a57d86f3a18b16f3a0a7e17bf281abdff817aced732e59a5a8c69ffc2
pdf-font-stream PDF embedded font (sfnt) at offset 0x1D86B 4740 bytes
font_01_sfnt_off0001e8bf.bin
d4a8001e49ee1d5ab2b2b83708e71ef97f537f1ab1f5cb126ffa602a9b6ea2aa
pdf-font-stream PDF embedded font (sfnt) at offset 0x1E8BF 11748 bytes