Malicious PDF — malware analysis report

Static analysis result for SHA-256 161d18a1718c7d81…

MALICIOUS

PDF

41.1 KB Created: 2020-04-06 04:09:24 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 6b54cf5f5395561f86115a57a14ebea4 SHA-1: 3ec512d9beda004e5ddc78c93c7353a15e02ed45 SHA-256: 161d18a1718c7d81364985d944e607f47c4e3cf6226e57b3716236c558069897
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1105 Ingress Tool Transfer

The PDF contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, pointing to various domains. The ML classifier also strongly indicated maliciousness. This suggests the document is part of a link farm or SEO manipulation scheme, potentially to distribute malware or phish users through the linked content.

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://mynaturalhairspa.com/uploads/1/3/1/4/131437628/131437628.html#espacio+muestral+de+2+dados
    • http://alyssabousquet.com/uploads/1/3/0/4/130490338/9350240.pdf
    • http://cbrownies.com/uploads/1/3/0/7/130775853/murebafi_gibudowox.pdf
    • http://famousfog.com/uploads/1/3/0/5/130589180/zelirenimun-gelozubiv-wapul-zewujel.pdf
    • http://facespromotions.org/uploads/1/3/0/4/130476372/sixigoboxaditat-reloranufun-jurutiselavam.pdf
    • http://upainspace.com/uploads/1/3/0/4/130476263/6204349.pdf
    • http://polishedthredz.com/uploads/1/3/0/6/130639776/kibisirekomif.pdf
    • http://psychomotricite-pays-bas.com/uploads/1/3/0/6/130604456/xodofobenazed.pdf
    • http://ncahrmm.com/uploads/1/3/0/3/130379087/49359.pdf
    • http://shapeyourmindset.com/uploads/1/3/0/5/130588589/d46627b808.pdf
    • http://dianacavallero.com/uploads/1/3/0/6/130620362/6169839.pdf
    • http://scratchboutique.com/uploads/1/3/0/6/130604257/kiwoselavafij.pdf
    • http://yorktownplumbing.com/uploads/1/3/0/6/130605094/9331680.pdf
    • http://musclegear-asia.com/uploads/1/3/0/4/130476506/14fb49.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • 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/
    • https://fedoraproject.org/wiki/Licensing/LiberationFontLicense

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006acb.bin
1fba831cbd5b64f674dabb0723862492e65afe2c74e934cb7bd94686bce0bb07		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6ACB 8904 bytes
font_01_sfnt_off00008b59.bin
95300a2ced9866eb3fed4395b0092872402b6461de7fc2cce37d24cb506e13cb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8B59 2880 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.