Malicious PDF — malware analysis report

Static analysis result for SHA-256 8f06c8a49fb7002e…

MALICIOUS

PDF

76.2 KB Created: 2021-03-19 19:19:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: daf81d1e0ca8168e70246d6501f7c5a0 SHA-1: aa1e08eed8cfc6243caab8da01811362429b34e1 SHA-256: 8f06c8a49fb7002e81777b7df50b9ea8850be702dbb7ef6ef4af4489cf65e28f
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 0.9996

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://ponafet.ru/wix?keyword=my+singing+monsters+hack+app+download+ios PDF link annotation
    • http://gaxenop.medianewsonline.com/43935655898.pdfIn PDF document text
    • https://xeluvepif.weebly.com/uploads/1/3/0/7/130738993/2e173bf.pdfIn PDF document text
    • http://kavelokafozi.medianewsonline.com/pernkopf_topographic_anatomy_of_man_free.pdfIn PDF document text
    • https://judoboraliler.weebly.com/uploads/1/3/4/5/134526606/nivem.pdfIn PDF document text
    • https://dozajumeguru.weebly.com/uploads/1/3/1/3/131379069/mokidaw.pdfIn PDF document text
    • https://goresizusozal.weebly.com/uploads/1/3/4/5/134524816/4547517.pdfIn PDF document text
    • http://worelimupuvefam.mywebcommunity.org/lumisudowojisigavixaxafed.pdfIn PDF document text
    • https://kovunigok.weebly.com/uploads/1/3/5/3/135317038/08df28.pdfIn PDF document text
    • https://tubenuluni.weebly.com/uploads/1/3/1/4/131437864/e5cfeacc0a2d83.pdfIn PDF document text
    • http://pazujiz.mygamesonline.org/how_to_change_font_size_on_brother_p_touch_pt-70.pdfIn PDF document text
    • https://jurazevogepepa.weebly.com/uploads/1/3/0/9/130969245/57ec75dd8a.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/3d6f4b01-f058-457d-9656-35978d5712be/sepebewi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2981907e-03a8-49e8-8308-c8a99dd247ad/hotpoint_gas_stove_igniter_replacement.pdfIn PDF document text
    • https://s3.amazonaws.com/jenagubadopi/24425001678.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/86f26630-b2b8-467c-95fc-edf4abbc1f9b/59363925216.pdfIn PDF document text
    • https://s3.amazonaws.com/sojaxub/tiwiwaxupuna.pdfIn PDF document text
    • https://s3.amazonaws.com/ronenitevodo/pitovuw.pdfIn PDF document text
    • https://s3.amazonaws.com/fajixe/casio_watch_set_time_5146.pdfIn PDF document text
    • https://s3.amazonaws.com/mexesazaxasa/letter_of_resignation_template_google_docs.pdfIn PDF document text
    • http://senesijosezetu.myartsonline.com/vukatexokuxitororedosefuj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3a3ade93-c9ad-47b6-a35e-78bff2d9a143/gc_services_limited_partnership_customer_service_number.pdfIn PDF document text
    • https://s3.amazonaws.com/mipizaju/94272377386.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_off0000ebbc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBBC 5748 bytes
SHA-256: cc7e61ff4ab3bff6c8e8427781b033c467c58a0840054b3a1cbab76298964fae
font_01_sfnt_off0000ff50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF50 10608 bytes
SHA-256: 6fc307008f9edc5f823be53ca94c7396ec4ab1485f85f73e44431cfa5a0205ed

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