Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f56544faab22829…

MALICIOUS

PDF

72.2 KB Created: 2020-12-28 00:58:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 611a7cdfa99ca7c51693060d95abedd1 SHA-1: 95c468e805feb666f4d1e924c3cbf69071817039 SHA-256: 9f56544faab228295a75e8bab8192d6bcccdb32f6042dba66f02b0682ba23485
164 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The 'SE_INVOICE_LURE' heuristic suggests the document's content is designed to trick users into taking action, likely by clicking on embedded links. One such link, 'https://traffnew.ru/123?utm_term=736+credit+score+reddit', is present and likely leads to a phishing or malware distribution site. No scripts were extracted, but the PDF structure itself contains numerous external links, some of which are flagged as potentially malicious.

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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://traffnew.ru/123?utm_term=736+credit+score+reddit PDF link annotation
    • https://lemuladi.weebly.com/uploads/1/3/4/3/134316580/pataligodoz_taperaguxidun_rekasovitet.pdfIn PDF document text
    • https://xepajozojiv.weebly.com/uploads/1/3/4/4/134476610/6722012.pdfIn PDF document text
    • https://lisiladojorinin.weebly.com/uploads/1/3/0/8/130874519/lamat_feliguvalejexib_rixuv_fabetuxirojolor.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/fifomi/scrap_aluminum_sheets_for_sale.pdfIn PDF document text
    • https://s3.amazonaws.com/topipovikapari/colmar_france_tourist_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/tesodagiwor/bakteri_agrobacterium_tumefaciens.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/56aa5402-988b-417a-adb8-ff788d7fce8a/dekafuzemipexejoluwe.pdfIn PDF document text
    • https://s3.amazonaws.com/tajimipojimo/85902611768.pdfIn PDF document text
    • https://s3.amazonaws.com/kigavanus/imperialism_review_crossword_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/jedobufudajewu/61344704853.pdfIn PDF document text
    • https://s3.amazonaws.com/mogedozara/geometry_complementary_and_supplementary_angles_worksheet_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/meludav/fitness_model_competition_prep_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/222cb01d-89de-492e-92b9-aa5a539dfb03/weekly_boat_maintenance_checklist.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files2/28615610294.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_off0000dc34.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC34 4996 bytes
SHA-256: fb29c332beeb4c24c315211ce591757ab2df9f3f6887151ec149b5f7340541a3
font_01_sfnt_off0000ed42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED42 11100 bytes
SHA-256: 5f9debd3a51b7cf764c957b1cb7958bd7923059250bd8895ff19eccde7796f23

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