Malicious PDF — malware analysis report

Static analysis result for SHA-256 6db8dffc0486b092…

MALICIOUS

PDF

62.6 KB Created: 2020-12-23 20:46:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 589f84d31606a1709d25448cb721dbc5 SHA-1: d71c3dbd959616c7b82038e01c68be1a0379c779 SHA-256: 6db8dffc0486b0926d15fe69f18473adab11e21bd19a5ca1f8acb39cc6f360f7
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains a mass external link farm, with one prominent URL pointing to 'traffine.ru'. The document body, though heavily obfuscated, appears to contain keywords related to search engine optimization and potentially lures users to click on the embedded links. The presence of numerous external links suggests an attempt to redirect users to potentially malicious websites for further exploitation or phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://traffine.ru/strik?utm_term=pictoword+level+551+answer
    • https://cdn.sqhk.co/goremujoz/hfhagju/agneepath_all_songs_video.pdf
    • https://cdn.sqhk.co/ledumixifer/xjiicgi/75696222940.pdf
    • https://cdn.sqhk.co/dowufagit/UghjivA/fnaf_vr_help_wanted_song_by_jt_music.pdf
    • https://gitilavoviko.weebly.com/uploads/1/3/4/5/134586482/widekef.pdf
    • https://cdn-cms.f-static.net/uploads/4367290/normal_5f910c33d045c.pdf
    • https://cdn.sqhk.co/linerutinew/KDjjFRk/24311461820.pdf
    • https://cdn-cms.f-static.net/uploads/4418970/normal_5f970c5ce9ca1.pdf
    • https://static.s123-cdn-static.com/uploads/4425483/normal_5fc82c4f359a6.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/87a3774f-2df3-488e-aef9-849e6811fd10/autocad_crack_version.pdf
    • https://s3.amazonaws.com/tozaduliwubega/buxeworetemese.pdf
    • https://s3.amazonaws.com/wogikokuzotaxa/mozilla_firefox_android_2._3._6.pdf
    • https://s3.amazonaws.com/fomudebipefasu/cgpsc_baba_syllabus.pdf
    • https://uploads.strikinglycdn.com/files/d4f8f826-214f-443e-9ddc-ca446443a3b6/pirate_bay_proxies_list.pdf
    • https://s3.amazonaws.com/rimejiguvif/clarinet_improvisatory_screaming_sheet_music.pdf
    • https://s3.amazonaws.com/tirimofufemukat/rozatedimufamaritotewakuw.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b985.bin
ebade0538be1d6937767eb335fae12a2c5d8578b5d34f0c27be71a5df9296e16
pdf-font-stream PDF embedded font (sfnt) at offset 0xB985 5264 bytes
font_01_sfnt_off0000cb98.bin
013ffa544b75a3848d3b81d8d79f6bf6fb7e6776809a4a9aef92a348b23d0c8e
pdf-font-stream PDF embedded font (sfnt) at offset 0xCB98 10088 bytes