Malicious PDF — malware analysis report

Static analysis result for SHA-256 4b08419468ccd809…

MALICIOUS

PDF

49.0 KB Created: 2020-05-13 05:39:30 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-09-04
MD5: 7a3a452ea4a47e84bc1a6b6d8d0dd516 SHA-1: fe4234cf635c5eba394127e5ef9a8ce5e10eff4f SHA-256: 4b08419468ccd8097f5f63aa24ecd1bb536c0f1813e75dfbbf86123971b86816
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.001 PowerShell

The PDF document contains a large number of external links, indicating a link farm or redirection scheme. The heuristic PDF_SEO_LINK_FARM firing suggests this is a common tactic for SEO manipulation or to distribute malicious content. The embedded URLs point to various domains, all structured similarly, suggesting a coordinated effort. No scripts were extracted from this sample, limiting the ability to determine specific payload delivery mechanisms.

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://joyofphysics.com/uploads/1/3/0/6/130640021/130640021.html#face+sheet+mask+korean PDF link annotation
    • http://thethorns.news/uploads/1/3/0/6/130605203/giluwupatazi.pdfIn PDF document text
    • http://peterbaugh.com/uploads/1/3/0/3/130324203/17ecac.pdfIn PDF document text
    • http://vanessa-desmarthon.fr/uploads/1/3/0/5/130590507/7499290.pdfIn PDF document text
    • http://phileincofil.com/uploads/1/3/0/6/130639116/f4ec0b74d0.pdfIn PDF document text
    • http://learmont.ca/uploads/1/3/1/4/131406456/884cc3698d6368.pdfIn PDF document text
    • http://vivaceimages.com/uploads/1/3/0/3/130323130/574075.pdfIn PDF document text
    • http://fasttraxxx.com/uploads/1/3/0/4/130483833/jufuj.pdfIn PDF document text
    • http://gringostacostand.com/uploads/1/3/0/6/130620544/bejosogir_febelanoz_dowenesilinefo.pdfIn PDF document text
    • http://hueboutique.shop/uploads/1/3/0/6/130640067/tazotumafe-wunadamivawozeb-navuludewupovu-dulogijegevijo.pdfIn PDF document text
    • http://mayfabindustrial.com/uploads/1/3/0/6/130620820/sifapawudaki_laduredanulu.pdfIn PDF document text
    • http://deweydaycamp.com/uploads/1/3/0/2/130271177/8147430.pdfIn PDF document text
    • http://shadefoot.com/uploads/1/3/0/6/130603859/zawavibu.pdfIn PDF document text
    • http://juliebakley.com/uploads/1/3/0/7/130775258/04f9cf951b7c.pdfIn PDF document text
    • http://wendykuiper.nl/uploads/1/3/0/6/130620240/6808972.pdfIn PDF document text
    • http://christinapalladino.com/uploads/1/3/0/6/130639777/zonovedubuv.pdfIn PDF document text
    • http://cruxgroup.org/uploads/1/3/1/8/131871883/nubeb.pdfIn PDF document text
    • http://mobislittrich.com/uploads/1/3/1/4/131453269/0813944b299e9a.pdfIn PDF document text
    • http://madsvig.net/uploads/1/3/1/4/131453215/1451681.pdfIn PDF document text
    • http://makeupbymemz.com/uploads/1/3/1/4/131438747/vajufabifesusopeguw.pdfIn PDF document text
    • http://bristol-accommodation.net/uploads/1/3/0/7/130740349/6537331.pdfIn PDF document text
    • http://migrationcelebration.com/uploads/1/3/1/6/131606165/lojob.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006f35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F35 6588 bytes
SHA-256: fa72874b8c381873b432d3b5cea9ecddba20f04e8e1c9face7d560df1136061a
font_01_sfnt_off00007faa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7FAA 10192 bytes
SHA-256: 7c662de6ac123146440f546387a8029948de8bb30967314996a600404d756381
font_02_sfnt_off0000a2bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA2BB 16036 bytes
SHA-256: 0fe8aa14d08365d6f8b61b1bc8ff310bb462f18a21f3c7286266bd86e60ec020

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