Malicious PDF — malware analysis report

Static analysis result for SHA-256 2431e867fbe19127…

MALICIOUS

PDF

37.9 KB Created: 2020-05-24 01:56:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-24
MD5: 813707121a93abb7fe3ae6aeefcdf39d SHA-1: 7f1ac1da9ae0d83edb63131dcbe1373f83812990 SHA-256: 2431e867fbe19127aa9b91b6731191ea3186eec0ca377cf1826972ec1a89d997
96 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic. These links point to various domains, suggesting a link farm or redirection scheme. The embedded document body text, though heavily corrupted, contains fragments of URLs that match the pattern of the external links. The primary purpose appears to be directing users to a network of potentially malicious or ad-serving websites.

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://lanie-logan.rominastiebenphotography.com/uploads/1/3/0/8/130874467/130874467.html#cat%2527+s+eyes+treasure+house PDF link annotation
    • http://greenwayfashion.com/uploads/1/3/0/5/130538875/3567476.pdfIn PDF document text
    • http://pdxprotree.com/uploads/1/3/1/8/131856135/popaw.pdfIn PDF document text
    • http://brothersphotographers.com/uploads/1/3/0/5/130539155/f8f960f.pdfIn PDF document text
    • http://wild-n-whimsy.shop/uploads/1/3/1/4/131408131/3538730.pdfIn PDF document text
    • http://pennyflickart.com/uploads/1/3/1/4/131411596/kosinaxejakalovajuj.pdfIn PDF document text
    • http://carlosewaumanjr.net/uploads/1/3/0/3/130324385/fuxebevonowimol-xokafiso-newidokive-sezew.pdfIn PDF document text
    • http://restaurantelenador.es/uploads/1/3/0/6/130603814/307668.pdfIn PDF document text
    • http://ittakes1tohelp1.com/uploads/1/3/1/3/131383813/5209551.pdfIn PDF document text
    • http://augustaraptors.org/uploads/1/3/1/4/131437025/2367336.pdfIn PDF document text
    • http://kyrstinkempf.com/uploads/1/3/1/3/131384544/ruzowetowi.pdfIn PDF document text
    • http://mathewsengineering.com/uploads/1/3/1/4/131406798/vavivekuluru.pdfIn PDF document text
    • http://ajmobilewashdetailllc.com/uploads/1/3/0/9/130969184/13d5f.pdfIn PDF document text
    • http://etck12mi.us/uploads/1/3/1/0/131071176/kogukirawinebudana.pdfIn PDF document text
    • http://manpile.net/uploads/1/3/0/8/130813887/fupedib-ravilupamoki.pdfIn PDF document text
    • http://viningssquare.com/uploads/1/3/1/4/131453259/nalajamuxizeni-ralusuzo.pdfIn PDF document text
    • http://texasdotexams.com/uploads/1/3/0/6/130640105/jifazuzefisitet_suwerorusaxino.pdfIn PDF document text
    • http://musicbandtogether.com/uploads/1/3/1/3/131380531/nobapapogerexelej.pdfIn PDF document text
    • http://beyondberkeley.com/uploads/1/3/0/9/130969185/7403345.pdfIn PDF document text
    • http://hodson-cacho.com/uploads/1/3/0/5/130540700/mepevajuvika-xisazodufufoke-direnokukuwoku.pdfIn PDF document text
    • http://sandiegoconventiondiningguide.com/uploads/1/3/1/3/131378990/afa7789aa2c.pdfIn PDF document text
    • http://floresconamorbolivia.com/uploads/1/3/0/5/130550976/3627388.pdfIn PDF document text
    • http://lineakornumrask.com/uploads/1/3/0/8/130874130/c6160df7f.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
🗂 Part of campaign: hodson-cacho.com 3 samples

Related samples 2

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

Full JSON: related samples API

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006550.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6550 11448 bytes
SHA-256: a911294d2d6650e6762b2d1e03cfa7749692b565896ac9f1a7f7a25a1ef91caa

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