Malicious PDF — malware analysis report

Static analysis result for SHA-256 d22b5c254bbc7415…

MALICIOUS

PDF

35.3 KB Created: 2020-06-05 00:20:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-15
MD5: cb115bf4c8a6ab46769920dabc5c104e SHA-1: edc3695574416128af911db3f6c4475e408d209c SHA-256: d22b5c254bbc741541908059a1c6bd55512a524f97761bba4b5581ab0d286f57
136 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1027 Obfuscated Files or Information

The PDF contains a large number of external links, many pointing to other PDFs, suggesting a link farm or SEO abuse tactic. The 'SE_PASSWORD_ARCHIVE_LURE' heuristic indicates the document likely provides instructions for accessing a password-protected archive, a common method to evade initial security scans. No scripts were extracted, but the numerous embedded URLs are the primary indicators of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://consciousrealignment.com/uploads/1/3/0/3/130323185/130323185.html#i%2527+ll+take+les+sheet+music PDF link annotation
    • http://dollardollarbillsyall.com/uploads/1/3/0/2/130270914/wezeworof.pdfIn PDF document text
    • http://greentech-engineering.com/uploads/1/3/0/6/130621203/doxunosa.pdfIn PDF document text
    • http://biobreakfast.co.uk/uploads/1/3/1/4/131453215/bunolezujinase.pdfIn PDF document text
    • http://prezdjs.com/uploads/1/3/1/4/131483421/nakuzig-visakafug.pdfIn PDF document text
    • http://mfmillstatltd.com/uploads/1/3/0/7/130775366/mewud-sozexamilate-zalubewogawax.pdfIn PDF document text
    • http://floorlandtexas.com/uploads/1/3/1/4/131406563/62ebac4e3705a7.pdfIn PDF document text
    • http://emilyfariel.com/uploads/1/3/0/4/130476657/pexiti_lifokapufudo.pdfIn PDF document text
    • http://consciousrealignment.com/uploads/1/3/0/3/130323185/terms.htmlIn PDF document text
    • http://consciousrealignment.com/uploads/1/3/0/3/130323185/dmca.htmlIn PDF document text
    • http://consciousrealignment.com/uploads/1/3/0/3/130323185/policy.htmlIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://tezebex184715663.files.wordpress.com/2020/06/xakojefamafirafixolu.pdfIn PDF document text
    • https://fibekabu.files.wordpress.com/2020/06/7705914009.pdfIn PDF document text
    • https://daxiwovinazu.files.wordpress.com/2020/06/61710441365.pdfIn PDF document text
    • https://xiletemud.files.wordpress.com/2020/06/tixikorimezo.pdfIn PDF document text
    • https://mukozumuj.files.wordpress.com/2020/06/2230871730.pdfIn PDF document text
    • https://sezidokopapu756670400.files.wordpress.com/2020/06/nukujudipirosisefivirukix.pdfIn PDF document text
    • https://wabufalij.files.wordpress.com/2020/06/30447236016.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
    • http://scripts.sil.org/OFLIn PDF document text

Related samples 1

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_off00005c5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5C5C 10956 bytes
SHA-256: 2774b9ec6a0ab069580d5a8ddd4a0257d214b8d253f6c21de3ec156f823e2826

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