Malicious PDF — malware analysis report

Static analysis result for SHA-256 e1b4f46d8dfa368e…

MALICIOUS

PDF

106.3 KB Created: 2021-03-17 02:27:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: add1e8e0f8acdb106061e4f486263007 SHA-1: edd914fb11e3cb6a9ba3b97a0eae2c13e1b5e52c SHA-256: e1b4f46d8dfa368e7483ac4e9b8b62fcfc577e106095b757d0b4610387075005
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, a common tactic for phishing or distributing malware. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically identified as a phishing trojan. The presence of embedded URLs suggests the document is designed to redirect users to potentially harmful sites, likely for credential harvesting or further infection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://bologen.ru/wix?keyword=ratios+proportions+and+similar+polygons+worksheet
    • https://lebotowim.weebly.com/uploads/1/3/1/4/131438344/muninope.pdf
    • https://cdn.sqhk.co/wabogojo/jbrxmZL/bibeli_mimo_atoka.pdf
    • https://cdn.sqhk.co/jawefujivi/esjgOgi/14593441533.pdf
    • https://cdn-cms.f-static.net/uploads/4374185/normal_60446aa7c371a.pdf
    • https://baduripafab.weebly.com/uploads/1/3/4/6/134623558/3126185.pdf
    • https://cdn.sqhk.co/gadowikuxe/yihhhhh/certolizumab_pegol_dosage_form.pdf
    • https://cdn.sqhk.co/turanexode/dmjiPj4/reluved.pdf
    • https://cdn.sqhk.co/fovuxugo/adjjjbN/65711669270.pdf
    • https://lanekugufer.weebly.com/uploads/1/3/5/3/135351315/d5c21f5828f.pdf
    • https://cdn-cms.f-static.net/uploads/4379970/normal_604ba05641176.pdf
    • https://cdn-cms.f-static.net/uploads/4426416/normal_6038bd6cc01e4.pdf
    • https://tusopapa.weebly.com/uploads/1/3/2/7/132712380/45a31.pdf
    • https://cdn.sqhk.co/vedasukuki/igjbvCk/animal_trance_ringtone_download_pagalworld.pdf
    • https://cdn-cms.f-static.net/uploads/4476126/normal_603f54a763a31.pdf
    • https://static.s123-cdn-static.com/uploads/4487197/normal_5fed70e8d6b20.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://680e7e7f-99bb-4309-8a01-ecc910dc7690.filesusr.com/ugd/717a42_2de2c61e1daa403488e0254799f1c768.pdf?index=true
    • https://s3.amazonaws.com/tupofelasujewas/bumbles_pet_guide.pdf
    • https://8aefc570-8454-48c3-bb63-d4d1067b7ce0.filesusr.com/ugd/5c9621_50831390016e45099de10037f3628dc1.pdf?index=true
    • https://a134ef9b-a212-4d8e-a35f-da3d896bbd40.filesusr.com/ugd/dadc92_0bcacb585d5242f69f17c43bc53aea0f.pdf?index=true
    • https://4b4ea461-5266-411b-8735-d5290551f550.filesusr.com/ugd/7fedcf_ca177fec94a04f41bb0c7350385d828f.pdf?index=true
    • https://6b5d12f1-3bbc-48af-9ddb-5430d2fe15e7.filesusr.com/ugd/3bf302_6b4ee98f2c2d42fe95afdd63765a432c.pdf?index=true
    • https://s3.amazonaws.com/pazerogasarinu/xevajikutepiludugix.pdf
    • https://s3.amazonaws.com/senodiw/volasonoledekukujadogilu.pdf
    • https://s3.amazonaws.com/juzowilipi/printable_gradebook_template_excel.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000160a7.bin
ffa18b36942ce20055439f92ce919573c742d66f55061d1caf5553a21c8be4ed		 pdf-font-stream PDF embedded font (sfnt) at offset 0x160A7 5640 bytes
font_01_sfnt_off000173ce.bin
6726b86727ed8d1b46374c604497fdcbe6222735a61526ed83a3bb8a2a284f51		 pdf-font-stream PDF embedded font (sfnt) at offset 0x173CE 11664 bytes

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