Malicious PDF — malware analysis report

Static analysis result for SHA-256 706107d6d92d03af…

MALICIOUS

PDF

32.6 KB Created: 2020-04-05 14:55:58 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 14f015b09880ccd69ccb3ab435a09aac SHA-1: 277fed6a34567002dc86199cde14c2e5d294d850 SHA-256: 706107d6d92d03af0a10b84170d6514606a09d1439c9e0e21bb774ab4ae3a0cd
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of external links, identified as a link farm, which is a common tactic for SEO spam or distributing malicious content. The ML classifier strongly indicated maliciousness. The embedded URLs are likely intended to redirect users to potentially harmful websites.

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://eventosesi.com/uploads/1/3/1/4/131437914/131437914.html#hyster+electric+forklift+error+codes
    • http://firstimpressionautobx.com/uploads/1/3/1/0/131071181/ludonub-witimopuxubo.pdf
    • http://whatthefashions.com/uploads/1/3/0/6/130621832/7436661.pdf
    • http://soldbymk.org/uploads/1/3/0/3/130379074/fijed-binomulaledafep-vawekaz-vitukokagoket.pdf
    • http://squirrellysheep.com/uploads/1/3/0/7/130738666/3733713.pdf
    • http://parshaincomedy.com/uploads/1/3/1/3/131398423/20c5193f.pdf
    • http://redesproyectosingenieria.com/uploads/1/3/0/6/130604598/b22aba1.pdf
    • http://kallesousana.com/uploads/1/3/1/4/131409055/garibamuj_vuwusifamebete_sujeselu_galan.pdf
    • http://mydispatchers.com/uploads/1/3/0/7/130739478/tipilaturut_lerezegibobir_jazexetak.pdf
    • http://monaelgohail.com/uploads/1/3/0/9/130969198/manolijukerom_nazilowege_xoxif_putokalixi.pdf
    • http://craftymidwife.com/uploads/1/3/1/4/131437726/xasavap.pdf
    • http://seameocelll.org/uploads/1/3/0/6/130620842/vipokupug.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_off00005730.bin
ca2df984dde8250858da6f39ee52b4343fa3e3d9a73099786084e8434ea47e35		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5730 7712 bytes

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