Malicious PDF — malware analysis report

Static analysis result for SHA-256 5b960daa37e9eb96…

MALICIOUS

PDF

71.2 KB Created: 2021-02-25 03:51:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: db56e10697835cda794e6e9f7b403ea3 SHA-1: a240ac9a7596dc80a337273c54601ade07555848 SHA-256: 5b960daa37e9eb96a6c3a9136db4c1e44c7e643ac916da3db5413a910e8f4da7
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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. Specific URLs and indicators for this sample are listed in the indicators section.

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
  • 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://crophysi.ru/wix?keyword=planet+arlia+vegeta+ebay PDF link annotation
    • http://salestore.pro/62169127658gj5ty.pdfIn PDF document text
    • http://zatoxuvisovapuf.sportsontheweb.net/matotelutedogekawofa.pdfIn PDF document text
    • http://jorowijedo.mywebcommunity.org/fluke_networks_pro3000_probe_user_guide.pdfIn PDF document text
    • http://characduwe.space/how_many_calories_in_a_subway_steak_and_cheese_wrap2ikyx.pdfIn PDF document text
    • https://cdn.sqhk.co/lutidofele/6wxgjgg/milikavupugorobafalugasu.pdfIn PDF document text
    • https://cdn.sqhk.co/gabixeme/kbUGgfg/satagevezesopejar.pdfIn PDF document text
    • https://vakilonote.weebly.com/uploads/1/3/1/3/131382032/rimutedu.pdfIn PDF document text
    • http://vivekawiga.sportsontheweb.net/81887126279.pdfIn PDF document text
    • http://tafugegajotu.mygamesonline.org/64382500104.pdfIn PDF document text
    • https://voxonased.weebly.com/uploads/1/3/1/4/131407877/tijigoxeve-teloj-vovige-xoforanif.pdfIn PDF document text
    • https://cdn.sqhk.co/kitaparek/iyidBJF/clan_race_apk.pdfIn PDF document text
    • http://uplrezina.site/adaptive_schools_strategiesn0q83.pdfIn PDF document text
    • https://regakoxunurur.weebly.com/uploads/1/3/4/3/134380337/280fff29a7.pdfIn PDF document text
    • http://onenature.space/macbeth_act_2_scene_3_audio6zjf2.pdfIn PDF document text
    • http://zuzorovix.scienceontheweb.net/sananonatinib.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
    • http://ziwemasux.myartsonline.com/13960007068.pdfIn PDF document text
    • http://tefetuzuzip.myartsonline.com/john_deere_compact_tractors_near_me.pdfIn PDF document text
    • https://s3.amazonaws.com/vovabagubajegeb/37807554025.pdfIn PDF document text
    • https://s3.amazonaws.com/voxulija/46029061.pdfIn PDF document text
    • http://wuwedilejom.myartsonline.com/83911672815.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_off0000ce6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE6A 4656 bytes
SHA-256: a0bd3f0d639d753e5946133a1da6b575215c8617b0cade896fc50786484917a8
font_01_sfnt_off0000de48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE48 10308 bytes
SHA-256: 74cb47b8fbbd5d0655dbab5ff13a88fdf5c68a7f8e32e64258987d2cb888d46a
font_02_sfnt_off000101a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101A8 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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