Malicious PDF — malware analysis report

Static analysis result for SHA-256 a717873b11bbcd86…

MALICIOUS

PDF

37.8 KB Created: 2020-05-15 06:59:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-04
MD5: a980237b23bdc0f78c3c17dacf57a347 SHA-1: 80d969cda983188281a21516ec652c33295c9106 SHA-256: a717873b11bbcd86e00179db6800b9ab71ace25a57b995d45ea837a35343ae3d
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, many of which are numerically or generically named PDF files hosted on various domains. The document body mentions 'Coin master cheats for android', suggesting a lure to attract users to click on these links. The heuristic 'PDF_SEO_LINK_FARM' indicates a deliberate attempt to create a link farm, likely for SEO manipulation or to host malicious content. The ML classifier strongly supports the malicious nature of this PDF.

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://victoriasaesthetics.net/uploads/1/3/0/2/130270897/130270897.html#coin+master+cheats+for+android PDF link annotation
    • http://tslapplications.com/uploads/1/3/0/6/130603925/5644780.pdfIn PDF document text
    • http://nourishhealthservices.com/uploads/1/3/1/4/131437655/wonunazexiv.pdfIn PDF document text
    • http://blondiesboutiqueofava.com/uploads/1/3/1/6/131606009/tijexexojesisoj-xevule.pdfIn PDF document text
    • http://effectivechangemanagement.net/uploads/1/3/1/8/131856129/7422775.pdfIn PDF document text
    • http://silverbirchhomestead.com/uploads/1/3/0/6/130640004/rapilumeme.pdfIn PDF document text
    • http://lamaintendue.net/uploads/1/3/0/5/130589420/9952231.pdfIn PDF document text
    • http://htxheli.com/uploads/1/3/0/7/130740123/lonuti.pdfIn PDF document text
    • http://motorcityracing.shop/uploads/1/3/0/3/130379336/gowunaxes_zekot_didabidokepeg_lutunuxinari.pdfIn PDF document text
    • http://boostmybalance.com/uploads/1/3/0/7/130739124/defa0cf.pdfIn PDF document text
    • http://allparts.ch/uploads/1/3/0/3/130324050/xorabe.pdfIn PDF document text
    • http://northstarconcretema.com/uploads/1/3/0/9/130969991/nerulifil.pdfIn PDF document text
    • http://theclatfordarms.com/uploads/1/3/0/5/130539315/gisapa.pdfIn PDF document text
    • http://515822216727963358.com/uploads/1/3/0/7/130775228/49039fdd7c705e.pdfIn PDF document text
    • http://wesous.com/uploads/1/3/0/5/130590261/mixixam_rodigeme.pdfIn PDF document text
    • http://infinityhealingcenter.com/uploads/1/3/0/7/130740011/38c654.pdfIn PDF document text
    • http://megs.studio/uploads/1/3/0/4/130435978/kabadumaregu-vovemuwi.pdfIn PDF document text
    • http://galandscapellc.com/uploads/1/3/0/4/130476804/7540834.pdfIn PDF document text
    • http://lizdowneyartist.com/uploads/1/3/0/3/130379676/8658151.pdfIn PDF document text
    • http://godofdreams.com/uploads/1/3/0/2/130287504/larexa.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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

Related samples 2

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000067a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x67A1 10520 bytes
SHA-256: e0bbda831874e931c1e9526f67255720df153a6b69d6874bce7586e3735c4631

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