Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa9d8a50a6c5e3f9…

MALICIOUS

PDF

38.7 KB Created: 2020-07-04 00:00:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-15
MD5: 04ade1ef366f729eda74f84f59fbc97e SHA-1: e74e0d85145e617cb43a38ba4c9c5cf3fc0d9014 SHA-256: fa9d8a50a6c5e3f9623b79f183cf4e3c69a8972a1b0882db0959948984b387e7
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting it's designed to redirect users to malicious content. The ML_NYX_PDF_MALICIOUS heuristic further supports its malicious nature. The document body, though partially obfuscated, contains several URLs that are also listed in the extracted URLs, reinforcing the link farm attack pattern. No scripts were extracted from this sample.

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://files.alphlukaupartners.com/uploads/1/3/0/3/130323593/130323593.html#carousel+viewpager+android+github PDF link annotation
    • http://designsbyelianah.com/uploads/1/3/0/7/130775522/045b0fc127.pdfIn PDF document text
    • http://stiryourinnerchef.com/uploads/1/3/1/3/131382539/kiwumiriwudi.pdfIn PDF document text
    • http://files.kravmagamacao.com/uploads/1/3/0/5/130588999/petetipodibeso_tenuwolevuteva_vemajetij.pdfIn PDF document text
    • http://tishmasciarelli.com/uploads/1/3/0/6/130605435/4da35a2768.pdfIn PDF document text
    • http://ruiwang.us/uploads/1/3/0/4/130483074/44285b06c23d9ed.pdfIn PDF document text
    • http://new-york.letenky-sky.sk/uploads/1/3/0/7/130740265/79284c951b92831.pdfIn PDF document text
    • http://files.bartlettartdepartment.com/uploads/1/3/0/5/130588574/51158333837e3.pdfIn PDF document text
    • http://trsorgiveaways.com/uploads/1/3/1/8/131856022/691596.pdfIn PDF document text
    • http://files.spinnakerspiritualdirection.com/uploads/1/3/1/4/131483078/6914228.pdfIn PDF document text
    • http://webdisk.myelegantmarriage.com/uploads/1/3/1/4/131408153/eae44c.pdfIn PDF document text
    • http://highly-reviewed.com/uploads/1/3/0/4/130436050/vuzuwadoj.pdfIn PDF document text
    • http://www.codexpedia.com/android/android-carousel-view-using-viewpager/In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://dukefemegol372789639.files.wordpress.com/2020/06/vewoverezoz.pdfIn PDF document text
    • https://binudekuteni.files.wordpress.com/2020/06/12820736602.pdfIn PDF document text
    • https://xabofufutin.files.wordpress.com/2020/06/50821048358.pdfIn PDF document text
    • https://lumozipezu858735365.files.wordpress.com/2020/06/vilozitemebufukazo.pdfIn PDF document text
    • https://fovesef.files.wordpress.com/2020/06/9969556513.pdfIn PDF document text
    • https://jerurig.files.wordpress.com/2020/06/gisujuxudifozonubada.pdfIn PDF document text
    • https://bebeleg.files.wordpress.com/2020/06/gutekojenukowuvemikake.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

Related samples 6

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

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005790.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5790 5420 bytes
SHA-256: e89ada7db72000d66384e6809f7234c884cc5bb9d1484fdbfad1f617201ca5eb
font_01_sfnt_off00006a04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A04 10584 bytes
SHA-256: ec13484559751c15bc94302a3b3663f8dd9c704779c145708390b1a21d69899d

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