Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f5048f57fa3a64f…

MALICIOUS

PDF

36.1 KB Created: 2020-05-14 23:58:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-24
MD5: 63e58be5b97e1ee4244b50a73e2e6a1d SHA-1: 566c5efff8f065d166f232b742bf0b2ca17dbf92 SHA-256: 1f5048f57fa3a64f44e88a267a580d988003f861ce5b30be1a2f1c53dec26841
96 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic. These links point to various PDF files hosted on different domains, suggesting a link farm or SEO manipulation tactic. The primary external URI found is http://distancelearningtoday.net/uploads/1/3/1/1/131164519/131164519.html#aspire+tigon+manual. No scripts were extracted from this sample.

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://distancelearningtoday.net/uploads/1/3/1/1/131164519/131164519.html#aspire+tigon+manual PDF link annotation
    • http://signaturewisdom.com/uploads/1/3/0/5/130589132/a22825873.pdfIn PDF document text
    • http://rotateproxy.com/uploads/1/3/0/4/130478123/jodatu.pdfIn PDF document text
    • http://mysportsmasters.com/uploads/1/3/0/4/130476970/rinuxopigumigut.pdfIn PDF document text
    • http://katiebasu.com/uploads/1/3/0/2/130287896/3056914.pdfIn PDF document text
    • http://lifelinecelebraterecovery.com/uploads/1/3/1/0/131070737/xevire.pdfIn PDF document text
    • http://cirosrgv.com/uploads/1/3/1/3/131380619/mamarofifuxi.pdfIn PDF document text
    • http://seeingeyedogsnhd.com/uploads/1/3/0/7/130775723/motegujivoj_ruzizex.pdfIn PDF document text
    • http://samantha-marsilla.com/uploads/1/3/0/5/130550956/437fa9f.pdfIn PDF document text
    • http://hawkinsfuntees.com/uploads/1/3/0/5/130590777/xulikerusilapi.pdfIn PDF document text
    • http://wpcbgagentleonzwart.com/uploads/1/3/0/2/130289448/53326f4fdd.pdfIn PDF document text
    • http://grownouveaudoula.com/uploads/1/3/1/0/131071066/03563dd94.pdfIn PDF document text
    • http://bakerstreetelementary.org/uploads/1/3/0/4/130435751/zowizexes-xozewizinem-sedapulodip-lanulu.pdfIn PDF document text
    • http://greyandbird.com/uploads/1/3/0/4/130476082/2082479.pdfIn PDF document text
    • http://gslpgtroop147.com/uploads/1/3/1/3/131381433/501129.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Related samples 4

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000057fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x57FD 2908 bytes
SHA-256: 50350638db53cc9473ff310e1d5590b364463bfa945201062b7aee9b643b4322
font_01_sfnt_off00006259.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6259 10012 bytes
SHA-256: 78a6778e40c5c656b9ff2a1f85938f2eba4e842e10b56086f25f278ce294855e

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