Malicious PDF — malware analysis report

Static analysis result for SHA-256 51d21c15febf7496…

MALICIOUS

PDF

78.6 KB Created: 2020-12-23 00:06:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 2e3bd80469b68160a5770e40bf605185 SHA-1: be39237171c420a598970b6459b571741b59cc84 SHA-256: 51d21c15febf7496d8fb40957cac9c7ebe231ed9adaf8098361437e54b438dae
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, with one pointing to 'traffnew.ru', suggesting a phishing or malware distribution attempt. The document body, though heavily obfuscated, contains text that appears to be a lure related to a 'balance druid talent guide', aiming to trick users into clicking the malicious links.

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://traffnew.ru/123?utm_term=balance+druid+talent+guide PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4385435/normal_5fad301b33a68.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479710/normal_5fac08d02a4b4.pdfIn PDF document text
    • https://pusazaninad.weebly.com/uploads/1/3/4/3/134358808/1173618.pdfIn PDF document text
    • https://jijelejo.weebly.com/uploads/1/3/4/5/134590633/xeruj-vazexaxapugom.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445324/normal_5fa65d9c3528f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/b2f09d9c-8f14-4083-baac-bc66ab14d65d/physical_science_notebook_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/72b7272e-bcc7-4f40-a464-1b1837fca9ca/xexikitoxefuguvuvu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a1b23d6f-0082-45ae-8c9d-3d9d06a1a7de/through_the_bible_with_pastor_chuck_smith_c3000.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/480d57a7-1f54-414e-a7f2-b8ccc0a28b18/17055954437.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dca6c3dd-9c47-4a21-be87-88960b7211ce/liwunanuruzaleko.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/65d1916a-c43f-4d9a-aa58-9d4c0eea425f/92712030219.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fd327ccc-d67d-4baa-91ed-e94e9519f5ed/kotozu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/826415ad-7793-41bf-b278-2519032b3599/amber_geiger_police_officer_trial_texts.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/15a2a70b-fa00-47a3-b247-3f94a51411e6/63744302451.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e058.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE058 4980 bytes
SHA-256: afda2a045f399ac0c67c82295293ea2b0f022ec2ce93fa4b9faf9947c32299de
font_01_sfnt_off0000f150.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF150 10936 bytes
SHA-256: 676398d5ae3fc251e6031b759b06dde4a3f44890a80206d430f259538a01e96e
font_02_sfnt_off000116cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116CB 16400 bytes
SHA-256: 44f9fd5195cf255265141daa3116ced55768786d3392a002edcbd73ee4379139

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