Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb2d7df30b8a804c…

MALICIOUS

PDF

33.7 KB Created: 2020-03-29 13:33:32 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: ea9ad8d6dd30478d7db545a26e61536a SHA-1: bcb7b540b5323f5e7d3d4d5cdfe0dcb53978441f SHA-256: bb2d7df30b8a804c7b73fa9ed964bb675899cb3b4f9d93084897a16c5310a9b9
96 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, many of which are hosted on domains that appear to be part of a link farm. The document body text, though partially corrupted, contains references to 'free download' and the document itself is identified as a 'generated_seo_pdf_links' type, indicating a likely attempt to drive traffic to these external sites for software downloads. The ML classifier also strongly flagged this PDF as malicious.

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://74-123-77-240.mgwnet.com/uploads/1/3/0/4/130435738/130435738.html#atv+offroad+fury+4+pc+free+download
    • http://sevenstarnetwork.com/uploads/1/3/0/5/130589213/05ce071.pdf
    • http://omahafreephones.com/uploads/1/3/0/6/130639454/guwakukenatu.pdf
    • http://dougmcelroy.com/uploads/1/3/0/3/130379285/4416467.pdf
    • http://jonathanoeportfoilo.com/uploads/1/3/0/6/130639634/nusivalufu.pdf
    • http://richti750.com/uploads/1/3/0/9/130969429/8910057.pdf
    • http://findyourhairdresser.com/uploads/1/3/0/8/130873946/7041426.pdf
    • http://interdependence.info/uploads/1/3/0/6/130604903/8017161.pdf
    • http://lilacsjoyandgrace.com/uploads/1/3/0/4/130483973/1269fea2666a3.pdf
    • http://sassynailswithsusan.net/uploads/1/3/1/1/131163760/6fff78e.pdf
    • http://kissakirja.fi/uploads/1/3/0/3/130323616/e20f4abe.pdf
    • http://guilberoo.com/uploads/1/3/0/5/130546880/3647309.pdf
    • http://remotewurk.com/uploads/1/3/0/5/130588656/wifov.pdf
    • http://whatsgoodclothing.com/uploads/1/3/0/5/130546742/ranip-rapeguz-rexazup-panubexoduk.pdf
    • http://marketforceonline.info/uploads/1/3/0/5/130538997/7451847.pdf
    • http://pencilmeportraits.com/uploads/1/3/0/3/130379332/5592368.pdf
    • http://asdtransportllc.com/uploads/1/3/0/8/130874511/nesukefupo_lefobiwer_nebejiwifasawiz.pdf
    • http://mattborn.net/uploads/1/3/0/7/130775104/4200389.pdf
    • http://warkentines.com/uploads/1/3/0/7/130775573/1161529d965b.pdf
    • http://hickorynuts.org/uploads/1/3/0/4/130435684/lepivevevirome.pdf
    • http://alchemecology.caryncoville.com/uploads/1/3/0/9/130969725/99dd4c83cd.pdf
    • http://ortizjose.com/uploads/1/3/0/4/130489220/9182570.pdf
    • http://cindycontrerasmua.com/uploads/1/3/0/3/130323517/xebibasoj.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_off00005bac.bin
cf4000abe86f60a26a77f8ad5656b9ff49dea4531088de4100c8a2acdeac5a90		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5BAC 6972 bytes

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