Malicious PDF — malware analysis report

Static analysis result for SHA-256 bdb420bae44dca9c…

MALICIOUS

PDF

79.6 KB Created: 2021-03-16 05:56:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 53d8bf80ae14ec7f1adae7d6093e7dbe SHA-1: 524a6f4254f4ebd47edc9c8b77cdd5ee92c0f67b SHA-256: bdb420bae44dca9c1eebe496b0031ae2964f195330eafe8137d2a4fa94ed2184
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-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://xajibur.ru/strik?utm_term=subway+chicken+breast+salad+nutrition+facts PDF link annotation
    • http://organicnu.info/sulekomapoliditolabaroc7bip.pdfIn PDF document text
    • https://cdn.sqhk.co/wuladupuzo/cjbOheX/dead_fish_eyes_meaning.pdfIn PDF document text
    • http://pixxel.life/5097667782wy6wd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366965/normal_60325c931f34b.pdfIn PDF document text
    • http://prechambre.xyz/how_to_find_impact_velocity_calculuszthqn.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461484/normal_60407052358c5.pdfIn PDF document text
    • https://cdn.sqhk.co/fexivijemozu/WlcFlic/dead_trigger_zombie_killer_cider.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488322/normal_602f714170a18.pdfIn PDF document text
    • http://bafiselavanebep.mywebcommunity.org/rapaveb.pdfIn PDF document text
    • http://tepuragebu.iblogger.org/free_printable_analog_clock_template.pdfIn PDF document text
    • https://cdn.sqhk.co/wuwosexed/igieQc7/kezegusafafum.pdfIn PDF document text
    • https://cdn.sqhk.co/bivuwusim/PidRB3Z/cara_membuat_website_gratis_di_android.pdfIn PDF document text
    • http://lighttravel-ng.com/coleman_roadtrip_classic_grill_manual4ros3.pdfIn PDF document text
    • http://pribor-poverka.site/california_7th_grade_math_textbookh0ap2.pdfIn PDF document text
    • https://cdn.sqhk.co/busosuwik/AIjgLgd/talisman_synonyms_in_tagalog.pdfIn PDF document text
    • https://cdn.sqhk.co/pekebugus/GWjcirI/39073557341.pdfIn PDF document text
    • http://fawikenaxalu.scienceontheweb.net/wogegegatejabalekese.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
    • http://dirolowu.rf.gd/what_happened_to_mr_tumnus_in_prince_caspian.pdfIn PDF document text
    • http://nabulegewuwal.myartsonline.com/what_are_the_36_spiritual_principles_of_aa.pdfIn PDF document text
    • http://pawubiba.epizy.com/55595370255.pdfIn PDF document text
    • http://vemenukesemi.epizy.com/what_is_the_easiest_welder_to_learn.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_off0000ec05.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC05 5492 bytes
SHA-256: aef9f9fe4d21b119d4614e2c7286cdf057a740c9818e0978f91414337cd91e6e
font_01_sfnt_off0000feb0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEB0 10600 bytes
SHA-256: 1505e84afd6a0bebe92d94f9054ae279c41caa93a703c8a68256660626c29ede
font_02_sfnt_off000122b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122B7 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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