Malicious PDF — malware analysis report

Static analysis result for SHA-256 80ae04c161da37b5…

MALICIOUS

PDF

100.3 KB Created: 2021-02-04 10:15:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 0d562d5379703baa86afd1f1c75cbfc3 SHA-1: 999683cf715ff087c631931a9ba95ee90dcc7a71 SHA-256: 80ae04c161da37b57332bf95b60614cba1fdc638f500583caded9805777dc25b
126 Risk Score

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 0.9996

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://jacksth.ru/aws?utm_term=define+circular+motion+answer PDF link annotation
    • http://1green.space/ribilakesatesokoq0wrp.pdfIn PDF document text
    • https://neninilez.weebly.com/uploads/1/3/3/9/133986457/4762181.pdfIn PDF document text
    • http://creditchecktotal.info/auto_body_repair_booksngpyb.pdfIn PDF document text
    • http://orbitan.fun/gurebogabuxoverivujevh247b.pdfIn PDF document text
    • https://jujowaganul.weebly.com/uploads/1/3/0/8/130874338/4274578.pdfIn PDF document text
    • https://tapajiwegunet.weebly.com/uploads/1/3/1/3/131380495/729787.pdfIn PDF document text
    • http://soinjaga.ru/camino_island_downloadk79hi.pdfIn PDF document text
    • http://goloszauniver.fun/farming_simulator_19_cotton_guideyr85s.pdfIn PDF document text
    • https://weromosamewose.weebly.com/uploads/1/3/4/2/134265498/letilafex.pdfIn PDF document text
    • http://yachts-4-sale.com/automotive_bulb_numbers6dzsl.pdfIn PDF document text
    • http://4kuhd.me/ski_safari_1xk0ku.pdfIn PDF document text
    • http://karnaval.host/datelorasusasoxp37pm.pdfIn PDF document text
    • http://livethailand.fun/141508290114so5l.pdfIn PDF document text
    • https://fuxiwuzepideka.weebly.com/uploads/1/3/1/3/131381491/safupirofub-dokavi-pefeke-pubidus.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://s3.amazonaws.com/sefepugolupalax/vakujawijebepozefupevemix.pdfIn PDF document text
    • https://s3.amazonaws.com/fezenur/badminton_test_questions_and_answers.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011e8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E8D 5120 bytes
SHA-256: 476cc46ea6f34b9a4cc4368ab0c1126b1d5b0b0e51a775d5aab0c3e2ed13a666
font_01_sfnt_off00012ffa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12FFA 12960 bytes
SHA-256: 5726d515b6f250b92cc4eff4359a6e8d8d89ff89d970b9afc5e675c610f347b9
font_02_sfnt_off00015c18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15C18 16036 bytes
SHA-256: 149cab45689013e99d1aa520d2e5234663aa5d8577b6aae5e423b5d60aeda4c1
font_03_sfnt_off000170bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x170BC 5012 bytes
SHA-256: 11c4001a81c02ec1ac7b252329da3a1b9869bf8cb55c9d7b23d383fb0cbdf9d1

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