Malicious PDF — malware analysis report

Static analysis result for SHA-256 a170e28c611def1a…

MALICIOUS

PDF

42.0 KB Created: 2020-11-07 17:56:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: fd448089f56636795fd653f11655ecc7 SHA-1: c6cbd6304742deef5edad47a0b870de9026f9bcc SHA-256: a170e28c611def1a3c51c9951294e34da3967b257a9ac33818c019d2d6bc4b25
96 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by an ML classifier and contains a large number of external links, suggesting a link farm or SEO spamming attempt. The document body contains a URL that appears to be a lure for 'Lastiseal stain reviews', likely intended to drive traffic to malicious or deceptive websites. While no scripts were explicitly extracted, the PDF structure and numerous external links indicate a pattern of redirecting users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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://traffset.ru/123?keyword=lastiseal+stain+reviews PDF link annotation
    • https://lusukukupesakub.weebly.com/uploads/1/3/0/8/130815137/pidupetagi_majitosukefuvuf_kilokezux_gojafe.pdfIn PDF document text
    • https://xukanimuwuvam.weebly.com/uploads/1/3/2/6/132696198/ccc27.pdfIn PDF document text
    • https://narebojabow.weebly.com/uploads/1/3/4/2/134266185/08ddd85755.pdfIn PDF document text
    • https://wulodegekejiwa.weebly.com/uploads/1/3/4/2/134266030/712dd8b413f0c24.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401691/normal_5f9b277d7e7c3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374838/normal_5f8dab485b783.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/zuxadol/30036510301.pdfIn PDF document text
    • https://wobonil.files.wordpress.com/2020/11/58401365237.pdfIn PDF document text
    • https://s3.amazonaws.com/bifamomove/mortal_kombat_vs_street_fighter.pdfIn PDF document text
    • https://s3.amazonaws.com/zetare/canon_eos_rebel_xs_manual.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005902.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5902 4448 bytes
SHA-256: 91eeab6add433eca70f44ef40ba608254f84150c8b5ec7965a229d10102bef86
font_01_sfnt_off00006821.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6821 10976 bytes
SHA-256: ed8bf306d5cda019814e1db8cfb0901aefefdc8084e7058a7c30edb5bf7db1e9
font_02_sfnt_off00008d62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8D62 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f