Malicious PDF — malware analysis report

Static analysis result for SHA-256 b17d58694f728872…

MALICIOUS

PDF

80.6 KB Created: 2021-04-21 00:48:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: d304bbaeccae4fe74ea19ce8aac86cac SHA-1: d6a8789e03f26416c2c0d03a41b6bd6c00966267 SHA-256: b17d58694f728872fab81c9c510d9bcb2767753c75aa1003772f398b85efa4d9
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The document functions as a link farm, containing numerous external URIs, with a primary URL pointing to a potential phishing or malware distribution site. The presence of multiple links on disposable hosting suggests an attempt to obscure the true destination or evade detection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://druttle.ru/strik?utm_term=navy+seal+training+hell+week+video PDF link annotation
    • https://boxoxezerutevok.weebly.com/uploads/1/3/4/3/134317212/3080744.pdfIn PDF document text
    • https://xonimitofowe.weebly.com/uploads/1/3/2/6/132682232/1239bdb1dd151d8.pdfIn PDF document text
    • http://hackins.site/ramelazamekiruxilsk0hd.pdfIn PDF document text
    • https://ditiboxoteripu.weebly.com/uploads/1/3/4/7/134763901/wiwepa.pdfIn PDF document text
    • https://tanedozuwo.weebly.com/uploads/1/3/4/6/134644204/9745990.pdfIn PDF document text
    • https://vobokalonumenu.weebly.com/uploads/1/3/4/6/134656332/rixepuxezor_xobulutewet_lagegilodegurij_kelabu.pdfIn PDF document text
    • http://bestsaleshopin.xyz/50_mile_ultra_running_planst4er.pdfIn PDF document text
    • https://wivutukezed.weebly.com/uploads/1/3/1/4/131438473/gifufoduj-gawew-xopajojopidi-tesive.pdfIn PDF document text
    • https://japafapu.weebly.com/uploads/1/3/1/4/131437770/xixuxugasagam.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://uploads.strikinglycdn.com/files/3aa6af67-4820-496f-8eeb-a05c07ca4d09/kebewavavarikidujetu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/404e9d84-a70c-4a59-ad4a-329f436f9f4e/army_cpof_tm.pdfIn PDF document text
    • http://daforewepon.epizy.com/broten_br_7000_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/robumuduluwise/sezop.pdfIn PDF document text
    • http://likasiz.epizy.com/bulking_meal_plan_bodybuilding.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/734d7123-0266-491f-916b-bcc77f134a9d/blue_book_price_for_cars_uk.pdfIn PDF document text
    • http://nititagamoba.rf.gd/78365002934.pdfIn PDF document text
    • https://s3.amazonaws.com/dalava/bestie_beauty_camera.pdfIn PDF document text
    • https://s3.amazonaws.com/xowasosuf/mera_shankar_bhola_song.pdfIn PDF document text
    • https://s3.amazonaws.com/donarepemi/45115269585.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/16531285-1651-4e9f-baa8-9df58590c512/58767436567.pdfIn PDF document text
    • http://kutarefaworowur.rf.gd/aprendizagem_e_inovao_organizacional.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_off0000ed2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED2C 5160 bytes
SHA-256: ae1a7b21dbd08a55341d305343dc5acf1d1b1d223a5f44bc75633cd38a3943ac
font_01_sfnt_off0000fec5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEC5 11504 bytes
SHA-256: fcc7906aa522e2af9a9326730688b73a6e3616de0350b92241f3c60cab7c9873
font_02_sfnt_off000124fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124FB 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c