Malicious PDF — malware analysis report

Static analysis result for SHA-256 8212eb6ea8a6fbf7…

MALICIOUS

PDF

78.9 KB Created: 2021-03-25 15:35:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 1cba6940332b768c882a363d40025a82 SHA-1: 85e527d8adb5fbb5b5c17d95df7e11418a002052 SHA-256: 8212eb6ea8a6fbf7bd519f17ceb10ae4dd4c0fe35f2d528df4ef28e272a60a93
126 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The PDF contains numerous embedded URLs, many pointing to disposable hosting and employing UTM parameters, suggesting a phishing or link-farming operation. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic specifically flags this behavior, indicating the document is a non-clustered link farm on disposable hosting.

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 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://fokemale.ru/123?utm_term=blended+learning+journal+pdf PDF link annotation
    • https://cdn.sqhk.co/jijubexovoz/iiigzOX/94586832053.pdfIn PDF document text
    • http://juilopkiretlo.ru/who_played_the_president_in_national_treasure_book_of_secrets82dla.pdfIn PDF document text
    • https://cdn.sqhk.co/vaminika/PheigfD/zujowezufaxibafu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376099/normal_603842857b2de.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446378/normal_60557724e3844.pdfIn PDF document text
    • http://teragoronowaki.iblogger.org/viwilaro.pdfIn PDF document text
    • http://usesalon.xyz/mabumiligijijusivoruqdqq5.pdfIn PDF document text
    • http://trixy-matrix.space/south_african_hip_hop_instrumentals6vx77.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4389095/normal_5ff8a02e31a38.pdfIn PDF document text
    • http://zebaxuf.iblogger.org/anger_of_stick_5_android_gameplay.pdfIn PDF document text
    • http://tuzurew.iblogger.org/pearson_psychology_chapter_9_quiz_answers.pdfIn PDF document text
    • http://mmmmmme.space/minecraft_skin_editor_onlinepsn2r.pdfIn PDF document text
    • https://cdn.sqhk.co/rolidazi/hdih1hg/ultimate_buggy_kart_race.pdfIn PDF document text
    • http://dimupure.22web.org/32544256222.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4469106/normal_5fcf9b2872c29.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/9f499c9b-d80e-411c-8cd0-0388f269ff4e/10612987192.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/110fb2d8-f5eb-46f0-a16f-0ab5e6438fe4/zoparaturiwuv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/79847bac-e09a-4250-a7de-6768724f90b4/92863867649.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/779329fd-fe44-4872-924b-7acaa0cc0d51/99393179452.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/058de769-fc24-43d4-a433-fe2e71b46daa/6030147543.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c2c5c4ca-bf92-4234-a253-335d17747a0a/regal_jumping_spider_diet.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_off0000f749.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF749 5156 bytes
SHA-256: 96eca3ab50d65fc99e1e587ac657d54cfff709a4dfd661f59f3a1cba971d98ab
font_01_sfnt_off000108f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108F0 10616 bytes
SHA-256: 3bbe26b546a4444873ba0532e171a420f9aa1c7c02cb908d3f74904b84197ad5

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