Malicious PDF — malware analysis report

Static analysis result for SHA-256 a13346199c2704e1…

MALICIOUS

PDF

43.8 KB Created: 2020-05-16 21:53:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-04
MD5: 20177260d819f76070174f3064f3b3da SHA-1: 771415d33d37ca6e9b7b8b3c47e652e3ef276d58 SHA-256: a13346199c2704e1c944314910958fc931be45bc4da75f46b3b02b2fb08ce972
136 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 User Execution: Malicious File T1059.001 PowerShell

The PDF document contains a large number of external links, many of which point to other PDF files, suggesting a link farm or SEO abuse tactic. The document body and embedded URLs indicate a lure related to a 'free full version' of a game, likely to trick users into downloading further malicious content. The presence of a 'Security software disable instruction' heuristic firing is a strong indicator of malicious intent, as it directly advises the user to compromise their own security. No scripts were extracted, limiting the analysis of direct execution capabilities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 5

  • 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.
  • Security software disable instruction high SE_SECURITY_BYPASS
    Document instructs the user to disable antivirus or security software — unusual for ordinary documents and high-risk in an unsolicited file
  • 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://yourbodydrip.com/uploads/1/3/0/5/130539645/130539645.html#age+of+wonders+free++full+version PDF link annotation
    • http://simpleegames.com/uploads/1/3/0/7/130776041/pixemekeka.pdfIn PDF document text
    • http://advancedpreservationservices.com/uploads/1/3/1/6/131606569/bde3586.pdfIn PDF document text
    • http://mountaincreekcondoforrent.com/uploads/1/3/0/5/130588527/gesovafib.pdfIn PDF document text
    • http://sightseethecity.com/uploads/1/3/1/0/131069893/gijulazasamog.pdfIn PDF document text
    • http://rentayurtinszeged.com/uploads/1/3/0/6/130621161/vojavunijemubuv-kewatibamega.pdfIn PDF document text
    • http://studiophotobuissonniere.com/uploads/1/3/0/6/130604886/9362874.pdfIn PDF document text
    • http://ssd1234.net/uploads/1/3/0/8/130874670/wasuzebizajupos_lanatulojozuv.pdfIn PDF document text
    • http://michiganroadmob.com/uploads/1/3/0/9/130969316/f526b1f2bb0c669.pdfIn PDF document text
    • http://stringsacademy.com/uploads/1/3/1/4/131483184/6847f07a51bc2.pdfIn PDF document text
    • http://northbrooksda.com/uploads/1/3/0/5/130590366/8440255.pdfIn PDF document text
    • http://met-wtor.pl/uploads/1/3/1/6/131637357/3206158.pdfIn PDF document text
    • http://losangelescue.org/uploads/1/3/0/8/130874322/3367992.pdfIn PDF document text
    • http://cannimke.com/uploads/1/3/0/2/130274355/bivatejere.pdfIn PDF document text
    • http://odonatahealthwellness.com/uploads/1/3/1/4/131413418/a4a2a7.pdfIn PDF document text
    • http://bluchipfreeview.com/uploads/1/3/0/7/130739887/puveluze.pdfIn PDF document text
    • http://r-ewolucje.com/uploads/1/3/0/5/130588202/vuvozipa.pdfIn PDF document text
    • http://joinangelbrokers.com/uploads/1/3/0/2/130272804/bewono.pdfIn PDF document text
    • http://onthejourney.store/uploads/1/3/0/4/130483869/6140165.pdfIn PDF document text
    • http://appliedchiropracticoftroy.com/uploads/1/3/0/7/130740012/e603f.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 5

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_off00007e5e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7E5E 11072 bytes
SHA-256: 744fee5496c580f024412aa8da204e1c26be4e2f4284ae9285733ee7e4d591bf

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