Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e15ad787c938616…

MALICIOUS

PDF

76.8 KB Created: 2020-11-26 03:58:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 3d9e70e5e890ac18079500c343ecc74f SHA-1: d453c94204c897bc9f63956d81d1a28a7db28b41 SHA-256: 3e15ad787c93861647f476ed6dc59ffb1ca88224cd379cc01a134131de8bda2b
194 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and contains embedded JavaScript. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://trafffe.ru/strik?utm_term=mushroom+hunting+in+wisconsin+state+parks PDF link annotation
    • https://fumubesoxumus.weebly.com/uploads/1/3/4/4/134485348/9c5c847ccf.pdfIn PDF document text
    • https://biwizodem.weebly.com/uploads/1/3/4/6/134650183/suzimuliti-xazek-dekowagugekif.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404105/normal_5f92adeb855c6.pdfIn PDF document text
    • https://mafukizagodixep.weebly.com/uploads/1/3/4/5/134525221/5183103.pdfIn PDF document text
    • https://wemibevufiwoseb.weebly.com/uploads/1/3/0/8/130813314/takirak.pdfIn PDF document text
    • https://xufolonul.weebly.com/uploads/1/3/2/6/132695880/cb5c24dbf86b.pdfIn PDF document text
    • https://weroxodadugofu.weebly.com/uploads/1/3/4/5/134503620/ed7a2c16a9d18a.pdfIn PDF document text
    • https://dikajumexuw.weebly.com/uploads/1/3/4/3/134324924/3813fb3e7.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/tetazino/claim_of_policy_def.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b2c17431-42d8-4bdb-823b-4184bf76bd36/wuwurogufiligulabu.pdfIn PDF document text
    • https://s3.amazonaws.com/regovadeje/32723025541.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f53561b6-656b-4ef5-a38e-78e2e044871d/66869642390.pdfIn PDF document text
    • https://s3.amazonaws.com/jagux/62023031525.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_off0000e0c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0C1 5356 bytes
SHA-256: d3e4a440b8e3048795f269ee8af90cc59e599f6a768c80998c89e030bf198956
font_01_sfnt_off0000f2ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2EF 10800 bytes
SHA-256: d7403259f43c64dedb28dd9e2aa512cb437716d286f902b05666d194eb2c8e06
font_02_sfnt_off000117d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117D0 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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