Malicious PDF — malware analysis report

Static analysis result for SHA-256 980e5c6edddf32a3…

MALICIOUS

PDF

78.2 KB Created: 2021-03-14 09:15:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 8827f03a5a959282488b4340e01e0a5c SHA-1: 9cc8eca13f7efc0c8b58c62d9dcbf3f69dfd327b SHA-256: 980e5c6edddf32a3d0c6946650dd574655de9183a88ac7fd19c691e398a314e8
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://crophysi.ru/strik?utm_term=what+causes+slow+intestinal+motility PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4470975/normal_6034d4db48c82.pdfIn PDF document text
    • http://bellissimo.online/28292009369itgs4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446170/normal_604104bdb0286.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456399/normal_6045075c75b63.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4401545/normal_5fdd61967a7db.pdfIn PDF document text
    • http://sakulog.sportsontheweb.net/the_lady_with_the_dog_theme.pdfIn PDF document text
    • http://feremujidonigu.getenjoyment.net/58585551457.pdfIn PDF document text
    • http://pobalulegofi.22web.org/what_is_energy_storage_in_plants.pdfIn PDF document text
    • http://paksorond.xyz/luna_nueva_online_latinoo00mc.pdfIn PDF document text
    • http://my-credit.info/total_gym_1500_workout_videordp5a.pdfIn PDF document text
    • http://nigavereke.mygamesonline.org/star_trek_the_motion_picture_script.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://rixigor.onlinewebshop.net/core_java_technical_interview_questions_and_answers_for_freshers.pdfIn PDF document text
    • http://tipakixulo.rf.gd/programming_ansi_c_balaguruswamy_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/kexamoxusinixu/game_of_life_cards_template.pdfIn PDF document text
    • http://manovubiludigi.rf.gd/the_vampire_diaries_jeremy_imagines_tumblr.pdfIn PDF document text
    • http://zazujipediwa.rf.gd/bakaw.pdfIn PDF document text
    • http://nobufep.epizy.com/android_10_oneplus_7_pro_rollout.pdfIn PDF document text
    • http://fozosoripivo.epizy.com/barinam_inna_sathutin_song.pdfIn PDF document text
    • http://redexini.epizy.com/66152512186.pdfIn PDF document text
    • http://pumuvezanasen.rf.gd/unbreakable_confidence_download.pdfIn PDF document text
    • https://s3.amazonaws.com/bipepezuwed/8705415691.pdfIn PDF document text
    • http://fovafejixafixon.rf.gd/rovomijosasijewolozodid.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f429.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF429 5152 bytes
SHA-256: 89bda99e3cb0c705ff3f211d330b0824a51ebc8398906856798a99bb5311391d
font_01_sfnt_off000105a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105A9 10876 bytes
SHA-256: 26636d415bde34757b28ffbfb81dbeffd12b63511b3bb639dd17a3f5b03b0589

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