Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d421ee9212a44ad…

MALICIOUS

PDF

71.5 KB Created: 2021-02-28 04:37:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 0732be2ea3e5269919553dc9c43c3320 SHA-1: e5b15cdc9247e03d8a64224125edde8fd168223d SHA-256: 0d421ee9212a44addbd0852e035fb3658b46afabe38487ee143a0e7e85a099a6
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of external links, identified as a link farm, with one pointing to a potentially malicious PDF. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and link farm suggest an attempt to redirect users to malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 https://druttle.ru/wix?keyword=twins+legends+club+seats PDF link annotation
    • https://ribugasa.weebly.com/uploads/1/3/6/0/136053023/rixomeb.pdfIn PDF document text
    • https://bozuwosumexoxal.weebly.com/uploads/1/3/2/6/132682772/porojaxoxi-kerugewewurag-vaxip-dobobanujumif.pdfIn PDF document text
    • https://tunawirivam.weebly.com/uploads/1/3/1/4/131437064/2390313.pdfIn PDF document text
    • https://cdn.sqhk.co/mevazasid/fwhhwie/spirit_airlines_baggage_policy_economy.pdfIn PDF document text
    • http://prod-fruit.space/boladajelalumunekufzmp1.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/wujapu/detew.pdfIn PDF document text
    • https://s3.amazonaws.com/xarojapi/fundamentals_of_economics_mcqs.pdfIn PDF document text
    • https://s3.amazonaws.com/zomuzigo/97976415219.pdfIn PDF document text
    • http://kasisexa.rf.gd/can_chiari_1_malformation_cause_seizures.pdfIn PDF document text
    • http://ramapenutizawa.epizy.com/29927411609.pdfIn PDF document text
    • http://lubudag.epizy.com/dipulevenaxa.pdfIn PDF document text
    • https://s3.amazonaws.com/wapabefizosumi/fonuw.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dc90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC90 5192 bytes
SHA-256: 581b15bb22325d01de4963a2d5525db07c728956a9bd20895f32c01727be042b
font_01_sfnt_off0000ee5e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE5E 10340 bytes
SHA-256: cfc2ee1c6f0f90bef1df43dc1f5759887e634b55fcb9737d5d36170aae8df1bd

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