Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f1209876b17a773…

MALICIOUS

PDF

72.5 KB Created: 2021-02-11 19:51:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 8d0ce3d595220d8badbc23f8acbb4300 SHA-1: cd1fcc8deedbc6fabbf46fceb7d8fdf29980035f SHA-256: 6f1209876b17a773c68cb169bedb71563d4d0307ef7e7cbb009e4a8193e39680
186 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing operation. The ML classifier and ClamAV heuristic strongly indicate maliciousness, with ClamAV identifying it as a 'Pdf.Phishing.Trojan'. The document body, though obfuscated, appears to be a lure related to WhatsApp chat archiving, directing users to external URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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/wb?keyword=how%20to%20archive%20chat%20whatsapp%20android PDF link annotation
    • http://xukewatamom.22web.org/galegoxosanu.pdfIn PDF document text
    • https://fitisajinuno.weebly.com/uploads/1/3/0/7/130739553/zaxekorususimiwizeka.pdfIn PDF document text
    • https://cdn.sqhk.co/joremeve/aidjgOh/vikefapipukesujuroxageva.pdfIn PDF document text
    • https://borerejo.weebly.com/uploads/1/3/4/0/134040615/suwom-nutiduba-wulupixirubazef-ripetober.pdfIn PDF document text
    • https://cdn.sqhk.co/makubeku/bhjbWie/titan_quest_ragnarok_best_builds.pdfIn PDF document text
    • https://cdn.sqhk.co/bevoletef/VhPKjdl/96169397922.pdfIn PDF document text
    • https://cdn.sqhk.co/torujazelome/PigSnhh/gupumopuk.pdfIn PDF document text
    • https://kekixulup.weebly.com/uploads/1/3/1/4/131407102/gizifanuwis.pdfIn PDF document text
    • https://cdn.sqhk.co/semejegofip/q6jiNij/57606821403.pdfIn PDF document text
    • https://cdn.sqhk.co/finelega/tiathbt/airplane_crash_dream_definition.pdfIn PDF document text
    • https://fojexoduzasob.weebly.com/uploads/1/3/4/6/134693365/e492e40e.pdfIn PDF document text
    • https://cdn.sqhk.co/fuluzagile/QNHiiii/gusuwapokelinuw.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/varoximu/adsense_responsive_blogger_template_free.pdfIn PDF document text
    • http://batalogafoma.epizy.com/bitlord_latest_version_for_mac.pdfIn PDF document text
    • http://bovifuxabobi.epizy.com/platform_puma_sneakers_rihanna.pdfIn PDF document text
    • https://s3.amazonaws.com/difigomisosak/lagorigepaniwemeledabujit.pdfIn PDF document text
    • https://s3.amazonaws.com/pobixedele/1800_frases_utiles_en_ingles.pdfIn PDF document text
    • http://zebigibozudival.epizy.com/tesav.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_off0000df44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF44 5240 bytes
SHA-256: 04471f4b25659bf38b7fe800cd53b3a15d7e6a18643ca529dc03feab5547e4cb
font_01_sfnt_off0000f128.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF128 10588 bytes
SHA-256: 666ba05ee153d5341418f76f8c32c9c4ab30dbd74db8ebcbaef361a76fde0b01

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