Malicious PDF — malware analysis report

Static analysis result for SHA-256 2912be153be24df3…

MALICIOUS

PDF

72.1 KB Created: 2021-03-23 12:40:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 2d0238cbf0ecfe8b7c4f578d6357ae18 SHA-1: 3772daef53c41cbf2473eef9df136b94da5066a2 SHA-256: 2912be153be24df37337e647d7c39a5924682ab5316b984bc2dffe3a41ad6a9a
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

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 0.9997

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/123?utm_term=belle+douleur+movie+free PDF link annotation
    • https://cdn.sqhk.co/litonesi/Aefhdhe/rikigewitezimosifipovo.pdfIn PDF document text
    • http://lifeit.pro/dont_care_lyrics_ed_sheeran5m6xx.pdfIn PDF document text
    • https://cdn.sqhk.co/dutimapo/gegeUid/lannister_armor_costume.pdfIn PDF document text
    • http://glasshookahcatering.com/what_are_the_rules_to_chinese_checkers73jts.pdfIn PDF document text
    • http://lnstagram-help-businesss.com/zener_diode_datasheet2j12q.pdfIn PDF document text
    • http://romeoplanet.club/pubedenutagugametfgd7p.pdfIn PDF document text
    • http://kengoru.space/meat_log_mountain012vm.pdfIn PDF document text
    • http://myimperfectmomlife.com/79082988608p7d5e.pdfIn PDF document text
    • http://rte-ita.fun/vubatidadixilozeniwcf25h.pdfIn PDF document text
    • https://widosogepe.weebly.com/uploads/1/3/3/9/133986955/3736657.pdfIn PDF document text
    • https://fikanofuzak.weebly.com/uploads/1/3/1/4/131438747/matataduwigobub_regatul_zuwutatewixor.pdfIn PDF document text
    • https://cdn.sqhk.co/besogevipadi/bPOhaja/64100164961.pdfIn PDF document text
    • https://cdn.sqhk.co/zoxunoromi/csvaBaD/raid_shadow_legends_review_pc.pdfIn PDF document text
    • https://nabudurokaralek.weebly.com/uploads/1/3/4/5/134576841/78482e1a003b7.pdfIn PDF document text
    • https://cdn.sqhk.co/levowexesu/bjaijxm/lazada_touch_n_go_ewallet_refund.pdfIn PDF document text
    • http://tehnotop.site/807789969235giq5.pdfIn PDF document text
    • https://cdn.sqhk.co/kalusoxat/x6qHIgf/bomalofuvalukodawulogasel.pdfIn PDF document text
    • https://cdn.sqhk.co/rowubuvuke/iihiggh/wemejakasimelo.pdfIn PDF document text
    • http://cetakchantek.com/what_is_age_of_reason_and_enlightenmentyd4pp.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/66d9d6f3-d8fb-4776-a756-598d711f2b30/how_to_search_person_name_by_image.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/af6a550a-be80-4583-a92b-4f1378d486ce/how_to_factory_reset_chamberlain_keypad.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_off0000dc76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC76 4776 bytes
SHA-256: 34d1b1aaf020d4b0dd696d6902827b9894af3548b1d77f78983c75cb5a20d805
font_01_sfnt_off0000eca8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECA8 11504 bytes
SHA-256: 0e24fe0aa3cc9b26a891de3bd5e96ca613f92c42856e8080cf1ca4761406b1fa

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