Malicious PDF — malware analysis report

Static analysis result for SHA-256 3698a337f83b9769…

MALICIOUS

PDF

69.9 KB Created: 2020-12-19 04:40:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 65d7c8ce6f2e7d85d36a45936ad43e4d SHA-1: 8ec8b2983e630414556df734f30d092fe591298c SHA-256: 3698a337f83b9769212eae8daa437c579c927b75b5f7ddd0351455ea6811cade
214 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for linking to known malicious redirector infrastructure, specifically pointing to 'traffine.ru'. It also exhibits characteristics of a PDF link farm, with numerous embedded URLs, including one that appears to be a lure related to a 'Gooloo jump starter power bank'. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to redirect users to phishing or malware distribution sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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 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.
  • 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=gooloo+jump+starter+power+bank In PDF document text
    • https://kerobasoxegetun.weebly.com/uploads/1/3/4/0/134017970/6160526.pdfIn PDF document text
    • https://mupoveno.weebly.com/uploads/1/3/4/3/134371030/2980937.pdfIn PDF document text
    • https://pulezigo.weebly.com/uploads/1/3/4/6/134600697/latinajokuvibumoje.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368763/normal_5fabe1118795c.pdfIn PDF document text
    • https://nolipugi.weebly.com/uploads/1/3/4/6/134652161/xofibutamura.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
    • https://s3.amazonaws.com/somamere/123movies_harry_potter_goblet_of_fire.pdfIn PDF document text
    • https://s3.amazonaws.com/debamijizozexo/endless_love_duet_sheet_music_free.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc36408403f5353fda5a38e/t/5fc5ed12eaf37e3b6468ecf4/1606806803248/kalaheo_high_school_logo.pdfIn PDF document text
    • https://s3.amazonaws.com/wanasuvedigo/90944307601.pdfIn PDF document text
    • https://s3.amazonaws.com/zuwosil/gadarujajokiwofol.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc539263398ff75154a2945/t/5fcb0eac9d29b56e4dfb8e3a/1607143086059/61845096470.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_off0000c7b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC7B0 5204 bytes
SHA-256: 35dd1db3efd345a67ff9dad82b21f1104e6faff978d081d2b935fe801a03b97e
font_01_sfnt_off0000d969.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD969 10316 bytes
SHA-256: 4ab008dccce62e61725f11689a2ab1fab8c80981abfcee3dc91b080ca18648dc
font_02_sfnt_off0000fc83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC83 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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