Malicious PDF — malware analysis report

Static analysis result for SHA-256 75961f843522368f…

MALICIOUS

PDF

72.5 KB Created: 2021-03-18 17:19:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: b7fe52f5a8e0111069dbe16d7e7f64ae SHA-1: c3cc7ef123420aef85df4b33dbdce0ba808dcb31 SHA-256: 75961f843522368fd6a4c73f041d0463329bce6fdf6952e0bc920f588cf124ef
136 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, and contains a high-severity heuristic indicating an SEO redirector link. The embedded URL, https://mezovuduw.ru/strik?utm_term=coleman+presidential+2+furnace+filter+location, is likely used to redirect the user to a phishing or malware download site. No scripts were extracted, but the PDF structure and URL suggest a phishing or malware delivery attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://mezovuduw.ru/strik?utm_term=coleman+presidential+2+furnace+filter+location PDF link annotation
    • https://bufogepuvuzi.weebly.com/uploads/1/3/1/3/131381066/6400398.pdfIn PDF document text
    • https://cdn.sqhk.co/waladoved/VOjiNhg/marketplace_foods_rice_lake_wi_ad.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445116/normal_604470284b4a8.pdfIn PDF document text
    • https://cdn.sqhk.co/pixazizaze/d6qAzny/wanogo.pdfIn PDF document text
    • https://depopuxa.weebly.com/uploads/1/3/4/8/134893869/zagesekedat-fuwel-bamiw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484355/normal_6048f6b91174e.pdfIn PDF document text
    • https://cdn.sqhk.co/dugelabomaw/evjbjdf/off_road_motorcycle_training_for_beginners.pdfIn PDF document text
    • http://gaydating.world/who_plays_zed_in_aftertlpnx.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489583/normal_5fe3c7036805c.pdfIn PDF document text
    • https://laludigulasi.weebly.com/uploads/1/3/1/4/131437637/2595043.pdfIn PDF document text
    • http://servisvds.ru/fukafukunujaxuperadalass098.pdfIn PDF document text
    • http://peuer.xyz/megunumimmt59.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408992/normal_602535e0e9c73.pdfIn PDF document text
    • http://sdfafq.info/5_minute_timer_video9oed8.pdfIn PDF document text
    • https://zusabave.weebly.com/uploads/1/3/1/4/131406295/5e9a4564556fe4b.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/minegikukovel/63235593523.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0d4ca064-1ec7-47be-aa00-e278a5e43d27/volume_price_analysis_indicator.pdfIn PDF document text
    • https://s3.amazonaws.com/lonozote/terraria_eater_of_worlds_guide_expert.pdfIn PDF document text
    • https://s3.amazonaws.com/buponuwebi/ditokapilojumelerofokine.pdfIn PDF document text
    • https://s3.amazonaws.com/bupaxomu/simple_game_design_document_template.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b1db04a2-42af-4450-ac39-a74fece0958a/what_ink_does_hp_4630_use.pdfIn PDF document text
    • https://s3.amazonaws.com/paxuvagal/3834601551.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dc51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC51 5336 bytes
SHA-256: 1261ad204d3977c1c2950918d499bb733a5ed4f7b6c7008f43bd6b4002d65206
font_01_sfnt_off0000ee59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE59 11160 bytes
SHA-256: 335a210961e2f412173d0c30b52dbe62628d6cbcd5d075b862f68f1b73b92bbd