Malicious PDF — malware analysis report

Static analysis result for SHA-256 04146b99b189fe96…

MALICIOUS

PDF

96.3 KB Created: 2021-03-26 00:11:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 183fb21efb1444d89c137587b826d84d SHA-1: 5e293eb41c22b4337545248a69330ab5af3178c1 SHA-256: 04146b99b189fe96974018034573ecf55a9a400a3b06178c9db1dd52d2883313
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 link farms or phishing campaigns. The ClamAV detection and ML classifier strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to redirect users to potentially malicious sites, likely for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9946

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-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://dafemum.ru/award?keyword=verifica+analisi+del+periodo+pdf
    • http://ludshop.xyz/matura_podstawowa_angielski_wiczenigtevs.pdf
    • https://cdn-cms.f-static.net/uploads/4498997/normal_603576e77859a.pdf
    • http://bogplaktnc.fun/478068532832yzn4.pdf
    • http://vilopeg.xyz/nutuxutominegatasimasokajo62g5.pdf
    • https://cdn.sqhk.co/libobivole/EKCyUih/timolerejavusoto.pdf
    • https://cdn-cms.f-static.net/uploads/4422180/normal_5fdac047b34e0.pdf
    • https://gilanevevo.weebly.com/uploads/1/3/0/7/130739192/lifukumejojiguj_jamevapeparir_norejuwen.pdf
    • https://cdn.sqhk.co/gapebeve/hDFjehf/6301167041.pdf
    • https://bitujidup.weebly.com/uploads/1/3/4/5/134598072/lekubowimuzekiv.pdf
    • https://tifevijokob.weebly.com/uploads/1/3/5/3/135351552/juvok-bilotoj-valitobok.pdf
    • https://puzugisebo.weebly.com/uploads/1/3/1/4/131438758/3794142.pdf
    • https://cdn.sqhk.co/jorawuge/vKjen1z/download_game_offroad_pickup_truck_simulator_mod_apk.pdf
    • https://cdn.sqhk.co/naludibeg/fjdgijg/300_east_front_street_traverse_city_mi.pdf
    • https://cdn.sqhk.co/wituwuxevef/ihZptOd/find_my_phone_apple_icloud.pdf
    • https://cdn.sqhk.co/bomagomax/7jejihi/tamil_mp4_movies_free_download_2020.pdf
    • https://lepasedesefin.weebly.com/uploads/1/3/4/6/134625589/9267025.pdf
    • https://cdn.sqhk.co/kovezozeseg/TMgjhdN/11939891480.pdf
    • https://cdn-cms.f-static.net/uploads/4426062/normal_5fd1ece270157.pdf
    • https://cdn.sqhk.co/jekunesoru/JjiGQuU/chuchel_download_mac.pdf
    • https://static.s123-cdn-static.com/uploads/4369781/normal_5fe447755e739.pdf
    • https://cdn-cms.f-static.net/uploads/4447877/normal_60340cf79e5ee.pdf
    • https://cdn.sqhk.co/jotoselu/gh1ojhU/8470220045.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/rovuweraja/what_are_some_speaking_skills.pdf
    • https://s3.amazonaws.com/dewutexorob/bemofur.pdf
    • https://s3.amazonaws.com/tuxutedi/how_to_write_a_newspaper_article_review.pdf
    • https://s3.amazonaws.com/mipeboro/dibapagurabibonadonewitos.pdf
    • https://s3.amazonaws.com/dedinavesute/bull_shoals_ar_fishing_guide.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000122a3.bin
ec71538f9e17b2a30eedfc43e6469de79638ff0ac97c373fdf7be0547b7c3574		 pdf-font-stream PDF embedded font (sfnt) at offset 0x122A3 5116 bytes
font_01_sfnt_off0001341c.bin
a2c00caf38903957040a278951e4bd2cdf04c1a148431d226cd9c54cb3d6de7d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1341C 13112 bytes
font_02_sfnt_off00015e03.bin
a95eff378c135b1ab40d10b3cd1da1bafbc07f86005f57898d079c90d712ddbd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15E03 16204 bytes

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