Malicious PDF — malware analysis report

Static analysis result for SHA-256 3a89c8067057889f…

MALICIOUS

PDF

72.9 KB Created: 2020-12-23 10:10:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: c169735085b0a72c95a4757f35c9e5d5 SHA-1: 341a62cf92b8d8355ff56e8767957ace69488aa1 SHA-256: 3a89c8067057889f30a8a3b2caa9c1f0639a1caa8dc1e3db7e047098feef23e0
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF document contains numerous external links, with a significant number pointing to Weebly-hosted PDFs, indicative of a link farm or SEO spam campaign. The ClamAV detection and ML classifier strongly suggest malicious intent, specifically identified as phishing. While no scripts were explicitly extracted, the PDF structure and embedded URLs are consistent with techniques used to redirect users to malicious sites for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://traffnew.ru/aws?utm_term=admob+ads+android+tutorial PDF link annotation
    • https://bixanizutojez.weebly.com/uploads/1/3/4/4/134490846/rofudofikakokomamaku.pdfIn PDF document text
    • https://fosozenasavo.weebly.com/uploads/1/3/4/8/134889966/8742543.pdfIn PDF document text
    • https://junaxukag.weebly.com/uploads/1/3/4/4/134493834/zuniz.pdfIn PDF document text
    • https://wepugimi.weebly.com/uploads/1/3/1/0/131070973/08477f7d.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/navoburarovada/16.4_biology_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/bededuxotulapil/drupal_8_theming_templates.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ac2b9943-240a-4d07-b52d-159384b9cdea/56706365271.pdfIn PDF document text
    • https://s3.amazonaws.com/makumapikeze/assassin_s_creed_odyssey_guide_book.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6a3df0b7-be46-452b-be24-7beac3c9a203/exercice_aire_et_primtre_5me.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6456dfee-af58-424f-81fa-13b637b0ce8f/case_in_point_book_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/jujadodedaruxix/womeribusegilaze.pdfIn PDF document text
    • https://s3.amazonaws.com/bovenotojitowe/jetegibuwipijideginex.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_off0000d254.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD254 4864 bytes
SHA-256: 9bb0016dc7f360a40864b72d84327d691731ffc03cbbb328b1536dd4ccb80d96
font_01_sfnt_off0000e2ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2AC 11252 bytes
SHA-256: a17c4646fa57431cee1f481f6482a9782ef90008ad1ab7e224d96431384a5b19
font_02_sfnt_off0001088c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1088C 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

Open this report in the interactive analyzer, or submit your own file for analysis.