Malicious PDF — malware analysis report

Static analysis result for SHA-256 7fe01cfc875e8d3e…

MALICIOUS

PDF

43.7 KB Created: 2020-04-02 14:00:28 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-09-24
MD5: 0ae4d843968f578e93ad887d9b49a17d SHA-1: ae7f75148135bc9cf3e5555e65a049abf1cb2251 SHA-256: 7fe01cfc875e8d3e02bc22c50df39975cbd90d830b73c7cf9889523a870cff7f
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a large number of external links to other PDF files hosted on various domains, as indicated by the PDF_SEO_LINK_FARM heuristic. The ML classifier also flagged this PDF as malicious. The embedded URLs suggest an attempt to manipulate search engine results or distribute malicious content through a link farm. 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://scrubs4work.com/uploads/1/3/0/8/130874388/130874388.html#el+principito+y+la+rosa+te+quiero PDF link annotation
    • http://theresetpoint.com/uploads/1/3/0/4/130483477/bizikerexoze.pdfIn PDF document text
    • http://oldmanmickstudios.com/uploads/1/3/0/5/130541346/2627736.pdfIn PDF document text
    • http://positively-jewish.com/uploads/1/3/1/1/131164120/fajamomegisasapum.pdfIn PDF document text
    • http://bossycatproductions.com/uploads/1/3/0/4/130435833/turegesu-tonuwa-solajopi.pdfIn PDF document text
    • http://laudatemariam.com/uploads/1/3/0/2/130289779/a2e2af2d0.pdfIn PDF document text
    • http://chiropractorglorieux.be/uploads/1/3/0/6/130604091/juzobabuxajido_zokivakevogelev.pdfIn PDF document text
    • http://mattbu.net/uploads/1/3/0/4/130483368/3f0bb88e2fb657.pdfIn PDF document text
    • http://gescare.net/uploads/1/3/0/5/130538836/zevur-vutikuxidiga-naweketazato-mapesoxodep.pdfIn PDF document text
    • http://ukustax.net/uploads/1/3/1/3/131398419/zefejupozad-jopuf-wepagatixozafix-bapetidemax.pdfIn PDF document text
    • http://arandy.net/uploads/1/3/0/8/130874474/saselosuxofiwege.pdfIn PDF document text
    • http://sunnylanefarmaz.com/uploads/1/3/0/6/130620710/5f6d6.pdfIn PDF document text
    • http://jellevandermarel.com/uploads/1/3/1/4/131406149/peviji-jefev-vifiwovu.pdfIn PDF document text
    • http://alliancepropertypreservation.com/uploads/1/3/0/6/130604475/a5875f5765cd4.pdfIn PDF document text
    • http://maridorcatering.com/uploads/1/3/1/3/131383319/ef103738b.pdfIn PDF document text
    • http://oakmonthistory.com/uploads/1/3/0/2/130271058/8468198.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://chicagolive.nm.org/uploads/1/3/0/6/130639651/627cc2e1.pdfIn 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
    • https://fedoraproject.org/wiki/Licensing/LiberationFontLicenseIn 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_off000076c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x76C0 8684 bytes
SHA-256: 32209a03d232185da4a913e37bb5794edcc2c325128d2904d3da8f7fd76169c4
font_01_sfnt_off00009637.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9637 2600 bytes
SHA-256: ccdb513f9f9b997ab503fae1484a3e920b4b4fc659fa9bd94a418ce32750de73

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