Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c1abf3f39d91f99…

MALICIOUS

PDF

39.0 KB Created: 2020-04-19 20:40:48 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 1268882f0e4e48f208a69d07d1783bc4 SHA-1: ddad87115c617730c32c75531ecdc7aafb2f729c SHA-256: 0c1abf3f39d91f99f588214152e85b40971aae75801abc3c79c3127bc2ddbf64
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains a large number of external links, a technique often used for SEO manipulation or to host malicious content. The document body, though heavily obfuscated, contains a URL that appears to be a lure for a manual, suggesting a phishing or social engineering pretext. The ML classifier strongly flagged this PDF as malicious, indicating a high likelihood of malicious intent.

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://riderinthemist.com/uploads/1/3/0/6/130604610/130604610.html#husqvarna+315x+manual+pdf
    • http://zarinaproductions.com/uploads/1/3/0/6/130640163/dulifo_duxuwakus_fagumorafa.pdf
    • http://fionaheartthekitchenshepherd.com/uploads/1/3/1/3/131380397/3266948c87b5.pdf
    • http://myiph.org/uploads/1/3/0/8/130814995/f097ec.pdf
    • http://maaloufindustries.com/uploads/1/3/1/4/131437099/xojaparivix.pdf
    • http://wrightroofingllc.com/uploads/1/3/0/5/130541186/dikeleninasipulo.pdf
    • http://luxzurybeauty.com/uploads/1/3/1/4/131453060/5fea65ebf0.pdf
    • http://glc-solutions.com/uploads/1/3/0/5/130588702/fubel.pdf
    • http://avadhaniestate.net/uploads/1/3/0/7/130775817/ragorisi_majorapixanafu.pdf
    • http://gemehi.com/uploads/1/3/0/5/130538842/gitanev_zunebimo_tabid_siwedime.pdf
    • http://yescreditacademy.com/uploads/1/3/0/8/130813701/589400.pdf
    • http://bellzclothing.com/uploads/1/3/0/5/130541817/viwagolawuva.pdf
    • http://breakfixcomputer.net/uploads/1/3/0/4/130489833/xapabodezi_guvikopad_wasejip_pekoxubuw.pdf
    • http://joniarchitects.com/uploads/1/3/0/5/130590392/9708963.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 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000071a0.bin
edf53aa57be4ac1ee202f29cdf04c293d3d8d41feb61cb8ac3e1fe90a6d8d633		 pdf-font-stream PDF embedded font (sfnt) at offset 0x71A0 7520 bytes

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