Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c7c27065e5d9d02…

MALICIOUS

PDF

37.4 KB Created: 2020-05-21 03:49:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5f2538f724e16a0aa06f6d6b4e248136 SHA-1: 5c2c85da71e920dbce7bed383699afe869626788 SHA-256: 0c7c27065e5d9d02907a7c3ad3be5b596aacc0df3d857daee84e40c89fca6ed6
96 Risk Score

Malware Insights

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

This PDF file was identified as malicious by an ML classifier. It contains a large number of external links, suggesting it functions as a link farm. The embedded URLs point to various PDF files hosted on different domains, which could be used to distribute further malware or engage in SEO manipulation. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://sealedtightroofing.com/uploads/1/3/0/6/130640239/130640239.html#mod+bus+mexico+para+18+wheels+of+steel+haulin
    • http://redthreadtraveler.com/uploads/1/3/0/6/130639147/pebelax-roloj.pdf
    • http://111-pod.site/uploads/1/3/0/5/130590030/fubipalewejovow.pdf
    • http://emmaelizabethphotography.com/uploads/1/3/0/4/130488565/zebefuma-rowipurenes-pukosifil-tevakun.pdf
    • http://goldingrain.com/uploads/1/3/1/1/131164095/jejotos.pdf
    • http://xn--missmichdesigns-inb.com/uploads/1/3/1/6/131637092/e9a592e4d3e9c37.pdf
    • http://reformo.studio/uploads/1/3/1/6/131606692/lakogiwajuma.pdf
    • http://nicoleraesocialco.com/uploads/1/3/0/9/130969888/2232b79.pdf
    • http://donalddistrictone.com/uploads/1/3/1/6/131637372/vogunox-roxoxefiwizofo-tarefaj.pdf
    • http://mrssecurityllc.com/uploads/1/3/0/5/130543070/a1a5febf2b02.pdf
    • http://teamagado.biz/uploads/1/3/1/3/131398109/lukuneg.pdf
    • http://centretiotiahke.com/uploads/1/3/0/5/130589353/vewefub.pdf
    • http://recordmichigan.com/uploads/1/3/0/9/130969384/3459731.pdf
    • http://southsoundwomenade.org/uploads/1/3/0/6/130639904/dabige_suvobisigu.pdf
    • http://christinamgalasso.com/uploads/1/3/0/7/130740412/fekabuzik_batipibera_puruvinibaw_seziwo.pdf
    • http://journeysofalifetime.net/uploads/1/3/0/7/130738940/375d3e32aead.pdf
    • http://50southsixthstreet.com/uploads/1/3/1/4/131453329/vorogizir.pdf
    • http://cakenetwork.us/uploads/1/3/0/6/130639027/buzesaruvovad-bezipa.pdf
    • http://sufficientgarden.com/uploads/1/3/0/5/130546434/98a9a6a903e7.pdf
    • http://hentonhills.com/uploads/1/3/0/3/130313213/8db317ad49c90.pdf
    • http://anthonyong.com/uploads/1/3/0/7/130775489/megugetepuj.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • 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/
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006688.bin
77beace211e222b064870d51473c13d683841292c895b61f492d1ebac3fda0e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6688 10224 bytes

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