Malicious PDF — malware analysis report

Static analysis result for SHA-256 a7694667eb066df5…

MALICIOUS

PDF

36.5 KB Created: 2020-06-14 03:51:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-24
MD5: 5095037482272c9223024a0ac0b80708 SHA-1: 21f67a16d507c7c02bc4b84e4c761ed8c793e8cd SHA-256: a7694667eb066df5046cd714e108d1d4afb16a309af3980aa02457af7e2ae880
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic. The document body text is heavily corrupted but appears to contain some of the linked URLs. The primary intent seems to be directing users to a network of linked sites, potentially for SEO manipulation or to host further malicious content. No scripts were extracted, limiting the analysis of direct payload execution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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 http://amandahessenutrition.com/uploads/1/3/1/3/131397938/131397938.html#f+klavye+on+parmak+%25C3%25A7al%25C4%25B1%25C5%259Fma PDF link annotation
    • http://caesarjewels.nl/uploads/1/3/1/4/131406303/3b7c1ffdfa55.pdfIn PDF document text
    • http://sonleducate.com/uploads/1/3/0/7/130775593/2d4ff1.pdfIn PDF document text
    • http://webdisk.juliewiegand.com/uploads/1/3/1/4/131409210/7885698.pdfIn PDF document text
    • http://westvalleycustoms.net/uploads/1/3/1/4/131484133/merenalijig-seketudajogupor.pdfIn PDF document text
    • http://edenfinding.com/uploads/1/3/0/3/130312974/jomikasapasixe.pdfIn PDF document text
    • http://jaydavismusic.ca/uploads/1/3/0/4/130489527/c70c5a.pdfIn PDF document text
    • http://macrotopia.com/uploads/1/3/1/3/131398182/5429502.pdfIn PDF document text
    • http://lexmorshipping.com/uploads/1/3/0/5/130590355/xopakonan.pdfIn PDF document text
    • http://47u.undesirable.us/uploads/1/3/1/4/131453429/15205069.pdfIn PDF document text
    • http://admin.rculjewelry.com/uploads/1/3/0/4/130483290/bopalexixa-vedoxasurasolip-rivowulipug-mekuriraxa.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://wibilek.files.wordpress.com/2020/06/wivevijuxi.pdfIn PDF document text
    • https://pinijerazod.files.wordpress.com/2020/06/wudivegituxadinob.pdfIn PDF document text
    • https://gibagiteje.files.wordpress.com/2020/06/40440694388.pdfIn PDF document text
    • https://merefipo.files.wordpress.com/2020/06/65780389508.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 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005d46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D46 12760 bytes
SHA-256: 1996638d3804107aec1d826515882454da7d42aa7337fe197501e2fd907817f3