Malicious PDF — malware analysis report

Static analysis result for SHA-256 231b396e1f1af3d6…

MALICIOUS

PDF

88.1 KB Created: 2021-01-23 11:40:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: d82c5ec068894b65db9c53fe89754a47 SHA-1: 94e454156a1d4927a204d958e0967efd99155a18 SHA-256: 231b396e1f1af3d6d52e64549385ea16d94ca83f781399889fe76c29667708ac
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection for Pdf.Phishing.Trojan and an ML classifier indicating maliciousness. The document body, though heavily obfuscated, contains text related to "stories of your life and others pdf download free", suggesting a phishing or malware distribution lure. Numerous external URLs are embedded, with one pointing to "trafftec.ru", likely part of the distribution chain for a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://trafftec.ru/123?utm_term=stories+of+your+life+and+others+pdf+download+free PDF link annotation
    • https://cdn.sqhk.co/jukusenefow/BhbLjep/21374639729.pdfIn PDF document text
    • https://cdn.sqhk.co/jepogedofuz/hhb94ha/forbidden_lands_gm.pdfIn PDF document text
    • https://site-1206985.mozfiles.com/files/1206985/castle_crashers_remastered_characters_magic.pdfIn PDF document text
    • https://site-1176752.mozfiles.com/files/1176752/org_2021_apk.pdfIn PDF document text
    • https://site-1248967.mozfiles.com/files/1248967/95400763112.pdfIn PDF document text
    • https://site-1233605.mozfiles.com/files/1233605/gozabenivaj.pdfIn PDF document text
    • https://jewutejaj.weebly.com/uploads/1/3/1/0/131070173/fc98fdffeffb.pdfIn PDF document text
    • https://vakozumemarob.weebly.com/uploads/1/3/1/0/131070483/8521309c4f.pdfIn PDF document text
    • https://wemakevarovafa.weebly.com/uploads/1/3/4/6/134636541/5328387.pdfIn PDF document text
    • https://site-1171131.mozfiles.com/files/1171131/ralaroputazozumawopabobe.pdfIn PDF document text
    • https://cdn.sqhk.co/xakelafu/K372ieL/jixuvoxikiwexip.pdfIn PDF document text
    • https://sumomaduge.weebly.com/uploads/1/3/4/8/134884200/pozumugugurobo.pdfIn PDF document text
    • https://kevafesituwa.weebly.com/uploads/1/3/4/0/134040773/8920031.pdfIn PDF document text
    • https://cdn.sqhk.co/vibisidumes/hdGLAt6/videoshop_video_editor_tutorial.pdfIn PDF document text
    • http://rujawobezixevib.iblogger.org/steam_room_stories_the_movie_parents_guide.pdfIn PDF document text
    • http://ralenexixozuk.iblogger.org/65239604313.pdfIn PDF document text
    • https://zuwogirunuwexi.weebly.com/uploads/1/3/5/3/135331524/a12b75e31f7c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://rupadulogoliwid.epizy.com/video_maker_fx_slides_free.pdfIn PDF document text
    • http://gatapin.rf.gd/bulletin_board_letters.pdfIn PDF document text
    • http://toxisokipefofo.epizy.com/99987820783.pdfIn PDF document text
    • http://zobatokuvanoz.epizy.com/wejuwavinewanozunolawuwi.pdfIn PDF document text
    • http://tededuliwe.rf.gd/27502367290.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_off00011ad8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11AD8 5428 bytes
SHA-256: 590da69f9cc64a3bb76363846ce757f983639c9609b088e5a6533a51b4be9a98
font_01_sfnt_off00012d58.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D58 10816 bytes
SHA-256: 3e12af94336b7947d4c765d9e78f00d9e6098f965f9e8b49b5c70661e9f9f838

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