Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0a22d7f436b13af…

MALICIOUS

PDF

83.7 KB Created: 2021-01-25 09:27:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: fb739aa4a139713694612b1875819ca4 SHA-1: 9da360a147c79aa30b071a25e7741a14c7332876 SHA-256: f0a22d7f436b13aff5d63196968468ce1b0e0cc95305f42d853d83b7d1cc3a3a
156 Risk Score

Malware Insights

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

This PDF file is identified as malicious by multiple heuristics and a machine learning classifier, with ClamAV detecting it as a phishing trojan. The document contains a large number of external links, suggesting a link farm or phishing attempt, and the embedded text mentions 'Kahoot hack bot spam answer hack', indicating a deceptive lure. While no scripts were explicitly extracted, the PDF structure and the presence of numerous external URLs strongly suggest it's designed to redirect users to malicious sites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://jottigo.ru/square?utm_term=kahoot+hack+bot+spam+answer+hack PDF link annotation
    • http://egosikenclub.com/714604635tgs41.pdfIn PDF document text
    • https://mopotiwifatuge.weebly.com/uploads/1/3/0/8/130813373/wavuwaz_gixipori_tuwaked.pdfIn PDF document text
    • http://pagebake.com/foravanizufepyrln4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449618/normal_5fc604cae5687.pdfIn PDF document text
    • http://copyright-infringement.business/ledegozejid82mg6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452193/normal_5fd1343f69a5e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4463262/normal_5feb3e0bd386a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407303/normal_5fe7ecb499e41.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4461495/normal_60064dadbf26c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370089/normal_6002b50506794.pdfIn PDF document text
    • http://slmit.space/194927787335c9ng.pdfIn PDF document text
    • https://tavadubamik.weebly.com/uploads/1/3/4/4/134473349/wibovetul_zibefiw.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368970/normal_5ff69d2824759.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/nonabafat/lol_evelynn_aram_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/vetamedisoz/letedenusi.pdfIn PDF document text
    • https://s3.amazonaws.com/midizaxopazeji/18335523837.pdfIn PDF document text
    • https://s3.amazonaws.com/mogedozara/71730008586.pdfIn PDF document text
    • https://s3.amazonaws.com/xulepiwa/93921438286.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

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d80b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD80B 5788 bytes
SHA-256: 386e364f330273d6d7372b82470a8797792d55561d8b281405ec33f52acd2a8f
font_01_sfnt_off0000ebe7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBE7 5408 bytes
SHA-256: bfeec15d636b6e611c79ed5520c759153aab638b404f1b874db71ada1736566f
font_02_sfnt_off0000fe25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE25 1800 bytes
SHA-256: daad3f347a4f42f432ee9983e619a7c063e36761dba5934b469418034847e28e
font_03_sfnt_off000106b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106B3 10756 bytes
SHA-256: 7954318450c7b719dd7cfe1c7f5c72564d075783708c8740cb2981e9137bfbd8
font_04_sfnt_off00012b95.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B95 16120 bytes
SHA-256: 653593fd1d80a85ed6f0165f1aba34eea3860f78c4af0c5284fe4824caf7b9a9

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