Malicious PDF — malware analysis report

Static analysis result for SHA-256 abffd6e8ab8cad35…

MALICIOUS

PDF

66.5 KB Created: 2020-11-28 03:34:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: d0fddf76b2ed79286e7078ff31395ed7 SHA-1: e45454ca3285fe945f920b0e37ebf1eb12d78e26 SHA-256: abffd6e8ab8cad3591cf7fc324e10fbad4d38cba6341c5d50d0e16d8d8f31df5
244 Risk Score

Malware Insights

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

This PDF document functions as a link farm, directing users to numerous external websites, including a known malicious redirector. The document's content is deceptive, masquerading as educational material to encourage clicks on these malicious links. The presence of embedded URLs and the heuristic firings strongly indicate a phishing or redirection attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://ggtraff.ru/aws?utm_term=punctuation+exercises+with+answers+grade+9 In PDF document text
    • https://xuzelete.weebly.com/uploads/1/3/2/6/132681171/17b76e65501ced2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374978/normal_5f8a218d29cb6.pdfIn PDF document text
    • https://rozolabo.weebly.com/uploads/1/3/0/8/130814594/fenamutimijirapapim.pdfIn PDF document text
    • https://tevirilozarenov.weebly.com/uploads/1/3/2/6/132695732/wisovi_rinujasizel.pdfIn PDF document text
    • https://kekerisasil.weebly.com/uploads/1/3/0/7/130775365/9996348.pdfIn PDF document text
    • https://togoritireso.weebly.com/uploads/1/3/4/6/134619717/c9732.pdfIn PDF document text
    • https://panidulupeju.weebly.com/uploads/1/3/0/9/130969186/merinorasaniv_nidikurawi_ketexirup.pdfIn PDF document text
    • https://bedizegoresupa.weebly.com/uploads/1/3/1/3/131379398/5473886.pdfIn PDF document text
    • https://sowosevutab.weebly.com/uploads/1/3/4/3/134311467/powiwatijij.pdfIn PDF document text
    • https://nuvefiwepopowu.weebly.com/uploads/1/3/4/5/134502743/bixowirog-pedegawus-voliloxiti.pdfIn PDF document text
    • https://xinulirolome.weebly.com/uploads/1/3/4/5/134599248/mofiku.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369651/normal_5fbe12151f482.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/gupuso/suzufisufa.pdfIn PDF document text
    • https://s3.amazonaws.com/sikuva/blue_fish_grill_bartender_training_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c5b9f676-c842-457b-b743-665ed12ce8dd/54915026352.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fc04b0eb-e038-404b-afa5-9be58286a383/96033869808.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_off0000c5cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC5CD 5488 bytes
SHA-256: 63fe1a31523916a9fe0380a335eadfed124d660c81e02946f67a38ff1277b56e
font_01_sfnt_off0000d888.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD888 10820 bytes
SHA-256: b4fa457aee4f98a6a7f7a18c5bd33ea47a0b7dc2d6d35ae0e1dc2b9359cda84a

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