Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0cf8e2ac2058fef…

MALICIOUS

PDF

70.7 KB Created: 2020-12-16 02:08:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 8ad6210684be472d6f75401ac777c0da SHA-1: ee86ee19728de499c76637cf2a3abf74610209f0 SHA-256: e0cf8e2ac2058fefd34d49423721da0f05f07189ff4ce118aff3a895b692051d
214 Risk Score

Malware Insights

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

The sample is a PDF that contains a large number of embedded links, many of which point to redirector infrastructure or link farms. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' indicates that at least one URL leads to known malicious infrastructure. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware. No scripts were extracted, but the PDF structure itself is weaponized to redirect users.

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
  • 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://traffking.ru/aws?utm_term=4th+grade+math+word+problems+worksheet+pdf In PDF document text
    • https://vafoguvisijun.weebly.com/uploads/1/3/4/8/134887412/fabawuwugizejix.pdfIn PDF document text
    • https://mewaxoraveju.weebly.com/uploads/1/3/4/8/134897470/6358904.pdfIn PDF document text
    • https://putigazabikikim.weebly.com/uploads/1/3/2/6/132682718/99c98c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc79997fc603311fbfb4135/t/5fce367f5d2e6f3bda67ed95/1607349887680/best_playlist_of_sinach_gospel_songs_2019.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf5176f3de5e49b55aebd3/1606373750528/mo_creatures_mobs.pdfIn PDF document text
    • https://s3.amazonaws.com/fezenur/probationary_period_evaluation_form_template.pdfIn PDF document text
    • https://s3.amazonaws.com/tesotiwapax/lake_ambience_sound_free.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc59b7d2cf09257bd8b9178/t/5fd70bca034a586a4f5ac695/1607928779080/caretaker_lease_agreement_form.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc6bf4244e997374a281700/t/5fcb2a9a21c0486e91906ad9/1607150234679/online_shopping_age_statistics_uk.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc54446bda9c57a97daf394/t/5fd0703306d21916ed6db835/1607495732683/62063459914.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_off0000d7f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7F9 5744 bytes
SHA-256: 1cfa0fcc0a79f8725ba88cea8a7cf3911f25a742c8767fabbe9f1199f0a5fa75
font_01_sfnt_off0000eb6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB6A 10060 bytes
SHA-256: 59b0ffb066a4c7f0ea11b03be37880f57321480d308f7baeddd41063be924aaf

Open this report in the interactive analyzer, or submit your own file for analysis.