Malicious PDF — malware analysis report

Static analysis result for SHA-256 f045619fde837c95…

MALICIOUS

PDF

38.0 KB Created: 2020-06-06 09:40:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-08-25
MD5: 89a41858e99e4f1438c2ba5dc1c581ca SHA-1: e72eae7e4dd47adddbafb1f916282dcbdec1733b SHA-256: f045619fde837c9567992dbc655ae8c69bb29074debcc2a6bd785799ca336dd8
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF document is disguised as a vehicle owner's manual, but it contains a large number of external links, indicating a link farm or redirection scheme. The heuristic 'PDF_SEO_LINK_FARM' specifically flags this behavior, suggesting the document is designed to drive traffic to other sites. No scripts were extracted from this sample, limiting the ability to determine further malicious intent beyond link distribution.

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 http://flagstaffsings.org/uploads/1/3/0/7/130740026/130740026.html#2005+suzuki+forenza+owners+manual PDF link annotation
    • http://ignitebreese.com/uploads/1/3/0/5/130541285/fdc0e.pdfIn PDF document text
    • http://equinediagnostic.com/uploads/1/3/0/7/130776079/ae28a.pdfIn PDF document text
    • http://c5events.ca/uploads/1/3/0/5/130588701/4afb33430b43a.pdfIn PDF document text
    • http://primeassetresale.com/uploads/1/3/0/7/130776088/2557582.pdfIn PDF document text
    • http://mta-sts.danavanhassel.com/uploads/1/3/1/4/131453464/9870336.pdfIn PDF document text
    • http://3170gordondrive.com/uploads/1/3/0/7/130740116/dc162b880be5d4e.pdfIn PDF document text
    • http://mail.somerscustomframing.com/uploads/1/3/0/2/130289649/fimetutaj.pdfIn PDF document text
    • http://mx.reneesgourmetpizzeria.net/uploads/1/3/0/5/130588278/5158797.pdfIn PDF document text
    • http://flagstaffsings.org/uploads/1/3/0/7/130740026/terms.htmlIn PDF document text
    • http://flagstaffsings.org/uploads/1/3/0/7/130740026/dmca.htmlIn PDF document text
    • http://flagstaffsings.org/uploads/1/3/0/7/130740026/policy.htmlIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://lubokafokazi.files.wordpress.com/2020/06/noxabunazagifedi.pdfIn PDF document text
    • https://pofulekat.files.wordpress.com/2020/06/51298998798.pdfIn PDF document text
    • https://pegolupoduw.files.wordpress.com/2020/06/63620260157.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_off000066d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x66D6 11072 bytes
SHA-256: f901cc8baab9a7c93c38174a9ddb356d0287d92911edcda8d052ec80254fd28b