Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ce8187b0abd7f2e…

MALICIOUS

PDF

41.2 KB Created: 2020-03-26 06:12:04 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 21dab82981aab97265f8e063280f9013 SHA-1: 993d9d0a1bc0a87c46d4a20361f71ac99ccf7273 SHA-256: 0ce8187b0abd7f2ed804f02042bafda369ae9762ae98698b023e94aafc2095e7
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document exhibits characteristics of a link farm, containing numerous external URLs pointing to other PDF files. The ML classifier strongly indicates maliciousness, and the heuristic firings suggest the document's primary purpose is to direct users to a network of external sites. While no scripts were directly extracted, the nature of the PDF and the volume of external links suggest a potential for hosting malicious content or facilitating further compromise.

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://northcurlcurlphysio.org/uploads/1/3/0/7/130775820/130775820.html#conjugacion+de+verbos+en+ingles+comenzar
    • http://webmail.lifechoiceprc.com/uploads/1/3/0/7/130775046/zisizedopa-witejozusexok-pizopa.pdf
    • http://nattertowing.com/uploads/1/3/0/8/130874045/jigiwileror_giwafewuwolulaj.pdf
    • http://ondeckfunding.net/uploads/1/3/0/8/130874658/tibaden.pdf
    • http://flowersbringjoy.com/uploads/1/3/0/8/130813831/xodam_sipef_xexupuzidaj_zejumudid.pdf
    • http://riesato.net/uploads/1/3/0/2/130272619/1d8876b9b2.pdf
    • http://sweetholmeeqc.com/uploads/1/3/0/6/130639362/a747191711c.pdf
    • http://experiencekailua.com/uploads/1/3/0/6/130639068/6735607.pdf
    • http://daviddemondphotography.com/uploads/1/3/0/6/130620519/kamabibenipugipew.pdf
    • http://karenvankampen.com/uploads/1/3/0/6/130639683/gobuxibonidejeki.pdf
    • http://adamgoodbet.com/uploads/1/3/0/7/130739324/8610161.pdf
    • http://www.glimpsesofgrace.rpjandco.com/uploads/1/3/0/7/130775221/miturod.pdf
    • http://flexmobilesolutions.com/uploads/1/3/0/9/130969685/9ca1bfc5a64a48f.pdf
    • http://gracefellowshipchurchky.com/uploads/1/3/0/7/130739826/wusofezawasok-wenuz-zixupe-wexeduz.pdf
    • http://weldingfabricationbyian.com/uploads/1/3/0/4/130490584/216bcfec.pdf
    • http://mobcentric.net/uploads/1/3/0/2/130289354/abb4ed9437c3ec3.pdf
    • http://blendora.com/uploads/1/3/0/4/130436222/depebefeb_fepowojisi.pdf
    • http://webdisk.thetraumacentre.ca/uploads/1/3/0/4/130489539/9ca3d8be9df9.pdf
    • http://teamworkcreation.com/uploads/1/3/0/4/130476766/917955.pdf
    • http://misdoc.com/uploads/1/3/0/7/130775195/pebexibulewifa.pdf
    • http://vancouvergaragerepair.com/uploads/1/3/0/2/130273842/3906861.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/
    • http://www.adobe.com/).Noto
    • http://www.google.com/get/noto/http://www.adobe.com/type/This
    • http://scripts.sil.org/OFLNoto

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006b21.bin
452f5bab68830f28789382e25dd5ec59450f8ec9a92af77a4ebb867eaf953f5f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B21 7568 bytes
font_01_sfnt_off00008721.bin
59d8a097129a595d6828513bcc5b4d47c00a7c4de9545a43efee4f2c176228e7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8721 4288 bytes

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