Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e350f7a6eb5a4fc…

MALICIOUS

PDF

85.3 KB Created: 2021-03-21 11:53:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 85988789f994c109d4d807d6670c5c7c SHA-1: 0735bd1882fbdd40527aa05cc8acc1efe2e65adb SHA-256: 7e350f7a6eb5a4fcb37bcdd81203091644d4d57e19f4d814e8ade630dc56e248
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 0.9967

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/award?keyword=the+pardoner+s+tale+analysis+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4488822/normal_604cf430c00e0.pdfIn PDF document text
    • http://lalewenesuku.22web.org/business_description.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4386363/normal_6002fa9ab075a.pdfIn PDF document text
    • http://betmoy57.com/tap_the_frog_hack_apk2v7e5.pdfIn PDF document text
    • https://radiduma.weebly.com/uploads/1/3/4/3/134362755/b25a1508645.pdfIn PDF document text
    • http://nonly.xyz/vetojajmwhvw.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4404108/normal_5fde08c37c880.pdfIn PDF document text
    • http://twitter-center.com/star_trek_discovery_season_3_episode_8_castnjo21.pdfIn PDF document text
    • http://tadenexibegujam.22web.org/what_order_does_the_white_queen_books_go_in.pdfIn PDF document text
    • http://nowuweg.iblogger.org/browser_firefox_free.pdfIn PDF document text
    • http://getyourscore.info/is_rockwool_fire_resistanth76ti.pdfIn PDF document text
    • http://verefdliyvtorogo.xyz/rixogisaxas4eio5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481161/normal_5fe1881b0e8f4.pdfIn PDF document text
    • https://zujuwedidikaf.weebly.com/uploads/1/3/4/3/134375258/tebutivukad_waxedivumezok.pdfIn PDF document text
    • https://zexejofamimow.weebly.com/uploads/1/3/1/4/131438337/5224534.pdfIn PDF document text
    • http://lagegisujego.iblogger.org/25248342468.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379487/normal_603054cc201b2.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://savipadegi.epizy.com/how_to_use_focusrite_scarlett_18i8.pdfIn PDF document text
    • https://s3.amazonaws.com/ganubatebedoxez/pisar.pdfIn PDF document text
    • http://wisunomimat.epizy.com/60007116248.pdfIn PDF document text
    • https://s3.amazonaws.com/gawabog/blacklisted_me_reprobate_romance.pdfIn PDF document text
    • https://s3.amazonaws.com/sixolose/5933138669.pdfIn PDF document text
    • http://milanati.epizy.com/axonopus_compressus.pdfIn PDF document text
    • https://s3.amazonaws.com/pevarijidasalop/268079522.pdfIn PDF document text
    • http://bakenexiradofo.epizy.com/95170803602.pdfIn PDF document text
    • https://s3.amazonaws.com/jajuzasalikirut/90876463083.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001100f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1100F 5180 bytes
SHA-256: 209be87d92cdbc5b506e6fc4f6549835a1d18e06d7792f5f99870bd89e2f422b
font_01_sfnt_off000121ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121AE 11044 bytes
SHA-256: 2f782cdb84f20fd8323809cb504ed2846fe576ac0127518313c79cad4795fd5d

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