Malicious PDF — malware analysis report

Static analysis result for SHA-256 a98e5d69972310f7…

MALICIOUS

PDF

85.4 KB Created: 2020-04-16 00:55:53 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: d7c3c2f0aec3607e39aa3a5d1645015e SHA-1: 5e0af6d1b8a6aa1264b2747cfa0efcc7a66f1b2d SHA-256: a98e5d69972310f7404fd478f4ebfe1570ba87a1cadc8242f39f69e4042a4d07
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, pointing to various domains. The ML classifier also strongly indicated maliciousness. The embedded URLs suggest a link farm or SEO poisoning tactic, likely intended to redirect users to malicious content or phishing pages.

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://ambtcex.com/uploads/1/3/0/7/130738970/130738970.html#spongiform+encephalopathy+definition
    • http://sts-ccc.com/uploads/1/3/0/2/130289668/ketomi.pdf
    • http://rsiwireless.com/uploads/1/3/1/4/131452903/wuzipi.pdf
    • http://curiousrebelknits.com/uploads/1/3/1/3/131379384/lozufosebud_zuwetopapep_xulabepojokoki.pdf
    • http://lifeonpurposeinc.com/uploads/1/3/1/4/131455722/fizabi.pdf
    • http://sophiamariehandmadeclothingaccesories.com/uploads/1/3/0/8/130874305/2471705.pdf
    • http://455-bonus.site/uploads/1/3/1/0/131070481/zuzefuwuguk.pdf
    • http://diablomotorcycleco.ca/uploads/1/3/0/6/130604241/9748245.pdf
    • http://pacific-travel.net/uploads/1/3/1/4/131437438/fobaw.pdf
    • http://amitaysadovsky.org/uploads/1/3/0/6/130621031/bodawagekuzun-kilozisepiwa-gilidog.pdf
    • http://dobrielles.com/uploads/1/3/0/6/130620964/5894822.pdf
    • http://autobrokerjobs.com/uploads/1/3/0/6/130604791/56a86.pdf
    • http://evansmultiplesolutions.com/uploads/1/3/1/4/131453216/c21be10.pdf
    • http://hikonnect.com/uploads/1/3/1/3/131383434/magunalonus_povulazuxazo_gumutu.pdf
    • http://kablinksecuritydoors.com/uploads/1/3/0/8/130814062/vatowolijala_jawitejo_wuxupebolenoke_xipepujerag.pdf
    • http://avviewdroneservices.com/uploads/1/3/0/7/130740202/b8b71.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011a58.bin
59b661c0cc45a82106989866fd2d7858830534a392c992a2170697edd81fc026		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11A58 10200 bytes
font_01_sfnt_off00013e9e.bin
5ece78146685736bf14e0656b7dbee1063afa5f3000cc2060ab6a70fb76730b0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13E9E 2696 bytes

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