Malicious PDF — malware analysis report

Static analysis result for SHA-256 ef1299ac2b7decbd…

MALICIOUS

PDF

69.8 KB Created: 2020-12-26 18:24:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 339d12d497a542699b171f2b16a5f412 SHA-1: 935c4cc6d7f73399a2d47e12fd6618a4d687f2a9 SHA-256: ef1299ac2b7decbd055b178a095165b339ef0c2b7e215f49695955d0d0b8f926
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a large number of external links, identified as a 'PDF_SEO_LINK_FARM' heuristic, suggesting an attempt to manipulate search engine results or redirect users to malicious sites. One of the external URIs, 'https://traffine.ru/123?utm_term=crossroads+co+op', is flagged as suspicious. The ClamAV detection and ML classifier also indicate malicious intent, likely related to phishing or hosting malware. No scripts were extracted, but the structure suggests a malicious document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://traffine.ru/123?utm_term=crossroads+co+op PDF link annotation
    • https://wesoxiworikezux.weebly.com/uploads/1/3/1/3/131380467/tobubi.pdfIn PDF document text
    • https://gimitowogavu.weebly.com/uploads/1/3/4/7/134746983/zopal-gejiruvomijese.pdfIn PDF document text
    • https://zoxitujiwa.weebly.com/uploads/1/3/2/3/132302939/d0edfb98e8b573.pdfIn PDF document text
    • https://lobobofu.weebly.com/uploads/1/3/4/6/134680821/05ab6b.pdfIn PDF document text
    • https://xiwabedosebu.weebly.com/uploads/1/3/1/3/131398066/begozot-gufexaridepizo-kobisebitemaso-xolovig.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/gavexilatuvitaz/32270535044.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2e68f1eb-91af-4371-af89-de24cd186b68/61038634058.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/06f00d44-9853-4877-893e-680a9f730dc9/fatugunixabapofupowuwino.pdfIn PDF document text
    • https://s3.amazonaws.com/genedesowul/61775803020.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ce74a6e1-b31b-4799-848a-fd9fcb397860/9987005822.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3abeebbf-af29-4296-8c0f-df47f0398d22/91461411699.pdfIn PDF document text
    • https://s3.amazonaws.com/wonoti/bitibepikuvovuzile.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cdc7d6d6-708e-4d67-bb93-6e904360910b/flag_removal_counseling.pdfIn PDF document text
    • https://s3.amazonaws.com/mubemutolewe/capitales_des_pays_africains.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 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d42d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD42D 4940 bytes
SHA-256: 819a1c55b9f8a20e2acca8d818c793bb25020235e717797d7f39ca9c838426a0
font_01_sfnt_off0000e503.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE503 10984 bytes
SHA-256: 8d76066dac98824b9d16d40c08c8148f969f3838eedf12145ea8c9916e7ccc3e

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