Malicious PDF — malware analysis report

Static analysis result for SHA-256 85666b46987654a3…

MALICIOUS

PDF

91.5 KB Created: 2021-03-14 16:54:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: fb5802eda263f980a830309cb10e8318 SHA-1: d6a7636ced7e7f295c6467e9b82166d2f5b3472b SHA-256: 85666b46987654a38b5160f9ae757dd864d5df83ca4dd8857246532fc9556707
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 0.9998

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://ponafet.ru/strik?utm_term=tell+me+3+good+things+about+yourself PDF link annotation
    • https://lusimijibujadex.weebly.com/uploads/1/3/4/6/134677052/1322857.pdfIn PDF document text
    • https://cdn.sqhk.co/tesosunimew/fAgdidL/how_to_charge_apple_pencil_without_ipad_pro.pdfIn PDF document text
    • https://xotomunekezej.weebly.com/uploads/1/3/1/0/131070571/wazonofikurewi.pdfIn PDF document text
    • https://cdn.sqhk.co/puzukebejas/g1lIzJz/42090850002.pdfIn PDF document text
    • http://dapajurop.mygamesonline.org/how_to_change_font_size_on_brady_tls2200.pdfIn PDF document text
    • http://chestlune.online/what_is_corporate_identity_numbernyvsj.pdfIn PDF document text
    • http://getepitisux.mywebcommunity.org/preguntas_ser_bachiller_2020_resueltas_dominio_linguistico.pdfIn PDF document text
    • https://nuvarimo.weebly.com/uploads/1/3/1/3/131378817/fonidifevakod.pdfIn PDF document text
    • http://ductsunlimitedins.com/switzerland_visa_lottery_application_formcjt1h.pdfIn PDF document text
    • http://ogranifruit.space/arsenic_contamination_in_west_bengalhbsrh.pdfIn PDF document text
    • https://cdn.sqhk.co/dudumadopole/hagfgju/god_of_stickman_3_mod_apk_happymod.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/muwomapotumugi/60075968936.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2fb43686-c701-434e-8762-807da4435b71/73841858252.pdfIn PDF document text
    • https://s3.amazonaws.com/tobovunoberiki/scansione_antivirus_online_gratis_per_android.pdfIn PDF document text
    • http://gosaduzunake.myartsonline.com/edgar_allan_poe_works.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7262e916-0774-427e-91c2-049b8b890e69/stronger_than_ever_quotes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1130d8fe-b8a9-488b-8161-346c57d8248b/konuvob.pdfIn PDF document text
    • https://s3.amazonaws.com/rogugagatuf/dukixuwelajef.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2569ae59-d509-4d93-bbc0-69c9c41d4086/the_other_side_of_midnight_on_tv.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001298c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1298C 5676 bytes
SHA-256: 9894c383519d13d54f1a043c8443b29af4649acf995b21f018f73f89980adc7d
font_01_sfnt_off00013cb2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13CB2 10556 bytes
SHA-256: d3bf952bc7d828cf6c38b58252579840d1154931a77f0e40ea5a492c2816f949

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