Malicious PDF — malware analysis report

Static analysis result for SHA-256 3a018b46c941c8ec…

MALICIOUS

PDF

66.0 KB Created: 2021-01-25 10:26:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: c7bd20270b045f1e2bd456320432ac21 SHA-1: 39ed6f1157528b0dd09f342dd3542a1adfa964e9 SHA-256: 3a018b46c941c8ecff92ca6c99865c5bf7859ab954b0e555ddd003209cb85c8a
184 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

The PDF contains numerous embedded URLs, with several pointing to known malicious redirectors and link farms. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded links suggest it's designed to exploit vulnerabilities or trick users into downloading further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://traffmen.ru/123?utm_term=glu+games+hack+android+apk In PDF document text
    • http://adyga.site/vr_wing_chun_trainerqh82j.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4418579/normal_6003a59be9bec.pdfIn PDF document text
    • https://cdn.sqhk.co/jigavozef/ecXgjjc/zombie_craft_survival_best_free_shooting_game.pdfIn PDF document text
    • https://cdn.sqhk.co/zuxatotukaru/ajchfgh/82343759914.pdfIn PDF document text
    • http://kogiwonewaveg.iblogger.org/38002121475.pdfIn PDF document text
    • http://lexibanoma.iblogger.org/rufus_windows_10_bootable_usb_free.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4365584/normal_5ff147a097831.pdfIn PDF document text
    • http://dresdenpharma.ru/amazon_gutschein_online_kaufen_rossmanna27xw.pdfIn PDF document text
    • https://cdn.sqhk.co/zamokaxu/ihjelhh/85182121013.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449771/normal_5ff0429d778e9.pdfIn PDF document text
    • http://bejuzoz.iblogger.org/earth_s_tilt_and_seasons_worksheet.pdfIn PDF document text
    • https://cdn.sqhk.co/pepitaji/d1Whbhe/download_game_clash_of_three_kingdoms_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/joxomawezu/rNvFhja/63339289844.pdfIn PDF document text
    • http://wekeb.space/74995913520ff7dh.pdfIn PDF document text
    • http://hotsales-com.xyz/musicals_near_me_2021jv8rp.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sojizodujibibo.epizy.com/rujomokofuvizemixaro.pdfIn PDF document text
    • http://jawegoxizifiti.epizy.com/acrylic_glass_sheet_for_kitchen.pdfIn PDF document text
    • http://tosivasode.epizy.com/livozi.pdfIn PDF document text
    • https://s3.amazonaws.com/bolovopizonuki/free_party_invitation_templates_australia.pdfIn PDF document text
    • https://s3.amazonaws.com/xukanomarexumu/16412533273.pdfIn PDF document text
    • http://wajalapivibobi.epizy.com/burrito_bison_mod_apk_2._83.pdfIn PDF document text
    • http://wuvuwipiwizovid.epizy.com/44956950840.pdfIn PDF document text
    • https://s3.amazonaws.com/wulotugadag/avast_secureline_vpn_for_pc.pdfIn PDF document text
    • http://fukorow.epizy.com/windows_7_pro_media_creation_tool.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_off0000c4cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC4CD 5580 bytes
SHA-256: 47b6c11d9eb944239b800c40df348a1329eb37f7dc325386640ee4f831a51dde
font_01_sfnt_off0000d7a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7A2 10180 bytes
SHA-256: a8703aa070dba4277d50c3490a31eeb45b6581235c297cdafb00ecf099798596

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