Malicious PDF — malware analysis report

Static analysis result for SHA-256 5861268aa4a42eba…

MALICIOUS

PDF

43.2 KB Created: 2020-10-25 19:00:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: c3086d2394737014fb046e3b8f859327 SHA-1: 747fd0cfa3726e87dc512a6fb3cf045fe0eb09ab SHA-256: 5861268aa4a42ebacc682b9614b687982c467695811aa8f3930cfc7fe7675277
154 Risk Score

Malware Insights

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

This PDF document contains numerous links to external resources, including a primary link to a known malicious redirector. The document body, though heavily obfuscated, contains references to a 'bill of sale' and URLs, suggesting a phishing or malware distribution lure. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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://cctraff.ru/aws?keyword=bill+of+sale+michigan+pdf In PDF document text
    • https://tanifovekula.weebly.com/uploads/1/3/1/3/131379991/9453910.pdfIn PDF document text
    • https://jewajufigojoxi.weebly.com/uploads/1/3/1/4/131438211/a6467c1ec800.pdfIn PDF document text
    • https://nipufijupetobug.weebly.com/uploads/1/3/1/4/131482996/b056072.pdfIn PDF document text
    • https://pesajupamobe.weebly.com/uploads/1/3/1/6/131607203/tuzulosujekaxegavez.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374686/normal_5f890897c9d22.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369499/normal_5f880e3582a76.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0491/6962/9350/files/discurso_de_unamuno.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6706/4991/files/rusidosezomipinamepas.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0493/4388/9562/files/83494388625.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/3862/8762/files/63511575186.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/21b8925f-1b52-47f9-99df-843a545f5c64/dizujawidotepigusove.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e2fd71bc-5a29-4000-bce4-1747e47c6a45/95255755867.pdfIn PDF document text
    • https://s3.amazonaws.com/tetazino/82278341595.pdfIn PDF document text
    • https://s3.amazonaws.com/tuzamada/98611200388.pdfIn PDF document text
    • https://s3.amazonaws.com/muxegeza/oxford_english_dictionary_vocabulary.pdfIn PDF document text
    • https://s3.amazonaws.com/nokiva/canon_lide_120_scanner_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0268/7647/7632/files/gumezokatafen.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5025/3984/files/34002006187.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/4155/3046/files/67148210216.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_off00006a13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A13 5524 bytes
SHA-256: b6b74ef3bbca006a1d2876e9f8a5b19f7a4dae747fe747344be43807056bec89
font_01_sfnt_off00007cbc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7CBC 10084 bytes
SHA-256: a5629f18af7a256af641814d9d5f1bb4a145cbd2f63962ff5d3ebe8350c1146a

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