Malicious PDF — malware analysis report

Static analysis result for SHA-256 4346fce11126a226…

MALICIOUS

PDF

63.3 KB Created: 2020-11-24 00:58:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 23e653f1b631a8e2ce53725623f289ca SHA-1: 10aea6e8b134ed30f5aa05230eea483c8801f546 SHA-256: 4346fce11126a226dab5b8211bc3abe822236c8727f8ac0d70239fe3e3553739
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://traffine.ru/strik?utm_term=aar+manual+of+standards+and+recommen PDF link annotation
    • https://natulawud.weebly.com/uploads/1/3/4/3/134309077/kasikobuletej-xukoga.pdfIn PDF document text
    • https://netulomite.weebly.com/uploads/1/3/2/8/132814473/3055836.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496597/normal_5fbc35bb2ba71.pdfIn PDF document text
    • https://pojutawetuje.weebly.com/uploads/1/3/1/3/131382470/novatesafimovorolut.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413969/normal_5fa44d596655b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453729/normal_5fb25cbc50548.pdfIn PDF document text
    • https://lerojapozexux.weebly.com/uploads/1/3/4/0/134016693/bufavosodijanen_wumibakejubi_daperu_gatarenaf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370055/normal_5f883fab620ef.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370533/normal_5f8a87224eed7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423189/normal_5fb75a65a96ce.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/kuboki/roloxikudovasekoki.pdfIn PDF document text
    • https://s3.amazonaws.com/piradi/duo_therm_rv_unit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aac3da56-8b75-4dba-a31e-4116397c912b/45833627424.pdfIn PDF document text
    • https://s3.amazonaws.com/vovabagubajegeb/uk_visa_tier_4_guidelines.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000af12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAF12 4992 bytes
SHA-256: eedcc52f2580ebbcf21e56be2bc296cbf27625f2e15e547c23011d4b531421c2
font_01_sfnt_off0000bfec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBFEC 10056 bytes
SHA-256: 4a74a695eac8aaacc2be01dcd870131bba76e3afb21876fb822a4cdd25427e3d
font_02_sfnt_off0000e236.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE236 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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