Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0514189ca9594df…

MALICIOUS

PDF

81.0 KB Created: 2020-12-23 19:34:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 4e0045477801896eeb785a908aeb2c96 SHA-1: e7cba8e21c2106611e8cecc82e771c03f357c3e1 SHA-256: d0514189ca9594dfe0301737886391c4b68960ca1dee143fc5afedbd696d9b3b
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains a large number of external links, many hosted on disposable domains, suggesting it functions as a link farm designed to redirect users to potentially harmful content. The document body, though heavily obfuscated, contains metadata suggesting it was generated by wkhtmltopdf, and the presence of embedded URLs points towards an attempt to lure users to external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • 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 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.
  • 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://traffset.ru/aws?utm_term=attendance+tracker+sheet+2018 PDF link annotation
    • https://tetikofigutuda.weebly.com/uploads/1/3/4/4/134445118/duvotuposuwiwaf.pdfIn PDF document text
    • https://cdn.sqhk.co/dadakafopina/MhfymaQ/retro_fridge_freezer_white.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386094/normal_5f95ab3b23f01.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420235/normal_5fb2a30745605.pdfIn PDF document text
    • https://sudororurupe.weebly.com/uploads/1/3/4/6/134602833/janav_relor_xopewujav_nafutofe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406473/normal_5fa873f361471.pdfIn PDF document text
    • https://masugofesobix.weebly.com/uploads/1/3/4/6/134656422/a499d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366627/normal_5fb7b8e878eda.pdfIn PDF document text
    • https://cdn.sqhk.co/kuvapipitol/BpdjexE/giposonoduserusisitabigob.pdfIn PDF document text
    • https://foderojev.weebly.com/uploads/1/3/4/0/134041652/8119496.pdfIn PDF document text
    • https://zubikazosiz.weebly.com/uploads/1/3/4/7/134761183/rujekawajo_nopabevejabud_xofiwuror.pdfIn PDF document text
    • https://cdn.sqhk.co/jozunufap/ggjeE7z/zidazixo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371498/normal_5fa56fd0815cc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4443598/normal_5fc93f0930085.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e486.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE486 5568 bytes
SHA-256: 91443d75ca7707b5c4bdf3eb30122e043899e389656d67ad7d1f8524773fc0ab
font_01_sfnt_off0000f76a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF76A 1596 bytes
SHA-256: c198a591ae584e5ce0ba4e9356ad643509fbd09026bb86d1b1e1e191a79662f1
font_02_sfnt_off0000ff8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF8B 9748 bytes
SHA-256: 4cd012efb6666d38072bb69d6d72dca03f0637e16651237d420b636f472f15c3
font_03_sfnt_off00012107.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12107 16144 bytes
SHA-256: 18f56b7fae04e07bc119a468ad323bdda099da77b0772854d1c47cc1f39b9f3b

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