Malicious PDF — malware analysis report

Static analysis result for SHA-256 d5eb0a036bbe3915…

MALICIOUS

PDF

78.3 KB Created: 2021-05-15 18:01:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 15a9c87706d272bed26c514d0ac851a9 SHA-1: 84de87128d4b47877f9b66e487e7d1b11e0ebe4f SHA-256: d5eb0a036bbe39151f984675007e3b77128b76082e35445d53e7f3ef1ed32cc1
156 Risk Score

Malware Insights

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

This PDF document was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains a large number of external links, suggesting a link farm or redirection mechanism. The document body, though heavily obfuscated, appears to be a lure related to technical information, likely intended to trick users into visiting malicious URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://midufefew.ru/strik?utm_term=what+kind+of+oil+for+poulan+electric+chainsaw
    • http://fuwijumazawad.mywebcommunity.org/jibopudalinagefisowilozi.pdf
    • https://cdn.sqhk.co/reparepoki/DKtqhii/line_puzzle_string_art.pdf
    • https://cdn.sqhk.co/jupozaregu/dqfP2Nx/download_car_simulator_2_mod_apk_data.pdf
    • https://cdn.sqhk.co/roretuduva/higjjii/xapegotalegozunojudodidep.pdf
    • https://cdn.sqhk.co/juwafajem/hje9Tie/47735228285.pdf
    • http://lixodamevurobar.mygamesonline.org/how_to_start_a_sportsman_2000_generator.pdf
    • https://cdn.sqhk.co/fopeziriga/hf87jdR/olympics_2020_logo_designer.pdf
    • https://cdn.sqhk.co/gegefemorosu/jcivZgh/best_jazz_albums_2020_so_far.pdf
    • https://cdn.sqhk.co/ledodatefu/z5Ak3jg/bubble_maniac_tea_house_houston_tx.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://6363ce23-9394-4102-a476-7be320345719.filesusr.com/ugd/7c41c1_5b419dd724ea4c39b5a19f0d6c2275a3.pdf?index=true
    • https://eaae50f7-3b1c-4f1b-9b3c-e2a48377569d.filesusr.com/ugd/b96e41_89647d0476f8486b844f573823e71fb2.pdf?index=true
    • https://f45985d3-969e-4a4b-a16b-f92b7c881388.filesusr.com/ugd/20da2d_eefd495a0382479cbd0e841717b2ddb2.pdf?index=true
    • https://3f7ff619-1e23-491c-a925-ddda4d79b49c.filesusr.com/ugd/79c22a_f59459fc64f6449999ed4152730efde0.pdf?index=true
    • https://edefa294-c65c-46c5-840b-8a4669b9fdfe.filesusr.com/ugd/e4a001_c8922fb2d87041a2b0946a2aeee94038.pdf?index=true
    • https://081e7fb2-604d-424b-9b75-a58d54a71a44.filesusr.com/ugd/abd6ea_5ae3d2fafc944cc08fd4ccdd6ca95a1f.pdf?index=true
    • https://6129906d-bc82-46a7-99f5-71793a58af3c.filesusr.com/ugd/d162e3_a05ba94e08614ac782138f7779c77e6a.pdf?index=true
    • https://s3.amazonaws.com/wazorixekunafob/bansko_ski_resort_information.pdf
    • https://s3.amazonaws.com/posufij/56638867511.pdf
    • https://ab60d57a-1f92-408f-9079-0b325776b613.filesusr.com/ugd/724fb5_22348036e2d3499a96d9881ea9e566c8.pdf?index=true
    • https://a8a2d6b8-6248-42a0-90a4-e25e421c2e59.filesusr.com/ugd/f63f29_98d34d46ad68417385ffd0f1bff8e05c.pdf?index=true
    • 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_off0000f1fc.bin
525240362e307f049ddab2abc33afb86a229a6b1098477e4c9952c16539dae10		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF1FC 5412 bytes
font_01_sfnt_off0001047b.bin
30b3f1d1ee7fbb1b98a9dc93f83b366fb46e47c1489a37149219ca73a0ffa23a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1047B 11460 bytes

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