Malicious PDF — malware analysis report

Static analysis result for SHA-256 f134f3caab84df67…

MALICIOUS

PDF

43.6 KB Created: 2020-05-15 23:15:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b5d0f1cbe8b3063eae6cea3f12bc1a71 SHA-1: 1d21741d8eeddc9d2e92f594579f21868d6afb56 SHA-256: f134f3caab84df672d2cd97ea9e8a29035b79992f1bd1766e123a3cf29307db6
92 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are numerically or generically named, suggesting a link farm or SEO manipulation tactic. The ML classifier strongly indicated maliciousness. No scripts were extracted, and the document body is largely unreadable binary data, but the presence of numerous external URLs points to a delivery mechanism for potentially malicious content hosted elsewhere.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 3

  • 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
  • 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://acouturelife.com/uploads/1/3/1/3/131383860/131383860.html#kalnirnay+calendar+2018+marathi+free
    • http://engagehearing.com/uploads/1/3/1/3/131379596/bekuxozor-tegiburu-mipunijatilirax-lagovu.pdf
    • http://utilistream.com/uploads/1/3/0/7/130776756/3269856.pdf
    • http://ogfwolfeboro.com/uploads/1/3/0/4/130435891/8403589.pdf
    • http://agmetalworx.com/uploads/1/3/0/7/130738989/1246065.pdf
    • http://pathpointstohealth.com/uploads/1/3/0/5/130539297/wafenumelef.pdf
    • http://lynnluetgers.com/uploads/1/3/0/6/130621715/tibizuzo.pdf
    • http://skyelilly.com/uploads/1/3/0/5/130588545/kozuxipeba.pdf
    • http://hhdeno.com/uploads/1/3/0/8/130874154/dedamoxu.pdf
    • http://jonkuhnglass.art/uploads/1/3/0/3/130379522/540601.pdf
    • http://togetherintothelight.com/uploads/1/3/0/8/130814763/9711316.pdf
    • http://nataliamcabrera.com/uploads/1/3/1/1/131164437/rareganudezuj.pdf
    • http://icfashionindia.com/uploads/1/3/0/7/130775525/xesudefa_navagarisita_gifexoxapuz_dolidobizolotun.pdf
    • http://motorclubofamerica6f.com/uploads/1/3/0/4/130488891/tasodot.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005865.bin
b0470588f1e137835dcf09602b75f7a7e175eb52cf6c4a22ce7decbb27a71978		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5865 9864 bytes
font_01_sfnt_off00007a75.bin
ebd2804bff382343e08f6a42dc45f69f4e794c08b23908ae60ba78ededae74b1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A75 16164 bytes
font_02_sfnt_off00008fc8.bin
8ca77f22653fa8dd73497e8daef176ee3d2e17100e5460cb27d0a51fd42ff936		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8FC8 5112 bytes

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