Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d97afbe50458d44…

MALICIOUS

PDF

38.8 KB Created: 2020-03-29 22:36:09 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 18e9e5d2ef8d0511195fdf97dda5a21a SHA-1: c93b3a51892e96a453ed23587569ecedfe5fc5c9 SHA-256: 1d97afbe50458d4434a5e6be16fd65b213a15ccd4c6fbd926f65c5bd871cb3b6
94 Risk Score

Malware Insights

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

This PDF document employs a link farm technique, embedding numerous external links that point to other PDF files hosted on various domains. The primary lure appears to be related to product information, specifically mentioning a 'Diehard portable power and jump starter'. The ML classifier strongly indicated maliciousness, and the PDF_SEO_LINK_FARM heuristic confirms the suspicious nature of the embedded URLs, suggesting a drive-by download or phishing attempt.

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://adsl-63-204-18-60.benefitplans.org/uploads/1/3/0/2/130289272/130289272.html#diehard%C2%AE+portable+power+and+jump+starter+model+number+71687
    • http://chuchies.store/uploads/1/3/0/3/130313192/xuroxogewu.pdf
    • http://asalegal.com/uploads/1/3/0/5/130590763/4de9008df.pdf
    • http://zweitemail.com/uploads/1/3/0/7/130776386/b03c2c50ae.pdf
    • http://arlingtoncarpetcleaner.com/uploads/1/3/0/6/130639363/86200.pdf
    • http://emilyisaacswellness.com/uploads/1/3/1/1/131164238/gufimizofuzu_kapewofo.pdf
    • http://bustillo-law.com/uploads/1/3/0/5/130590682/vowebavu_bobif_xumixakaleki_korosuxakowadul.pdf
    • http://tru-tek.org/uploads/1/3/1/3/131380183/wopujolu_kapuxak.pdf
    • http://mail.inovamedtech.com/uploads/1/3/1/3/131381521/wutuligus-winipi-godokipi-sapojejukesiva.pdf
    • http://kipeedfotos.com/uploads/1/3/0/3/130313186/kamiduzemojawobefe.pdf
    • http://amillerlearning.com/uploads/1/3/0/7/130740218/xugebak.pdf
    • http://zhuangguo94.com/uploads/1/3/0/6/130603682/5d45967788.pdf
    • http://tayleelanefitness.com/uploads/1/3/0/6/130621293/c65bd4a4.pdf
    • http://absolutepediatrics.net/uploads/1/3/1/4/131407918/4008834.pdf
    • http://zendogs.net/uploads/1/3/0/6/130603890/8111826.pdf
    • http://davisairrepair-nwa.com/uploads/1/3/0/7/130738933/2b0db4e.pdf
    • http://melobalyd.dk/uploads/1/3/0/8/130813577/7670187.pdf
    • http://ifixcorporation.net/uploads/1/3/0/6/130621544/nurenuzolaxob.pdf
    • http://recoveringflautist.com/uploads/1/3/0/5/130551219/zajus.pdf
    • http://milestonestherapygroup.com/uploads/1/3/0/6/130604824/62d16.pdf
    • http://aurawhiteset.com/uploads/1/3/0/8/130874369/manet_zewurabevaxiva_migotixevugiwan_gavupusot.pdf
    • http://orlistrone.com/uploads/1/3/1/0/131069808/7c834c392.pdf
    • http://franzeloutfitting.com/uploads/1/3/0/3/130323362/06c400a5f.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006b63.bin
c95b609c6c7e9a257de71008a980017657a505c938999eb1c6afd2875bdba02e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B63 7836 bytes

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