Malicious PDF — malware analysis report

Static analysis result for SHA-256 35986c5fe4edc7e6…

MALICIOUS

PDF

37.3 KB Created: 2020-04-08 03:49:31 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 16e9b80a69f016635a6bc585a294ecfc SHA-1: 65a403e34fb270a4c199d78a87140b1c2ed0e355 SHA-256: 35986c5fe4edc7e66cd2a56c70d89878b37b17f3aec4ac3b621b9be946409cbd
94 Risk Score

Malware Insights

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

The PDF file contains a large number of external links to various domains, a technique often used for SEO poisoning or to redirect users to malicious content. The ML classifier strongly indicated maliciousness. The document body, though obfuscated, contains references to URLs that are part of this link farm, suggesting a coordinated effort to distribute malicious content or phishing lures.

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://jamoral.com/uploads/1/3/0/6/130605253/130605253.html#army+policy+letter+on+paternity+leave
    • http://alcovyblue.com/uploads/1/3/0/7/130739446/fuwujexinomi.pdf
    • http://gcshading.com/uploads/1/3/0/5/130543840/fubedazadelid_mefivemezetel_seliredumunonu.pdf
    • http://118finefoods.com/uploads/1/3/1/4/131409158/vowasuwoluxu.pdf
    • http://landscapingtoowoomba.com/uploads/1/3/1/4/131407388/1647632.pdf
    • http://karstproductions.com/uploads/1/3/0/6/130622049/204e82e9ab06.pdf
    • http://movethissite777.com/uploads/1/3/0/8/130813059/6159e3798.pdf
    • http://villagegalleryeltham.org/uploads/1/3/0/9/130969472/52b685fbc60.pdf
    • http://experienceperigord.com/uploads/1/3/0/2/130272580/nifiza_gunevagoberog_maxefaz_nadod.pdf
    • http://santeaffariindustries.com/uploads/1/3/0/6/130604962/nugugegediwesi_jadom_zepovete_wejilix.pdf
    • http://hipnosremotional.com/uploads/1/3/0/4/130492771/5820880.pdf
    • http://ojalaportfolio.com/uploads/1/3/0/2/130270987/1460563.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/

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006a1c.bin
a8fee76b1d6bf961857c71753ddc0c8392dedb1a0abb20a7fc1e99b4b27f4b5b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A1C 7712 bytes

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