Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e9d1ebc27be507c…

MALICIOUS

PDF

80.8 KB Created: 2021-03-24 18:28:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9bfeb32ac05dab4c5434c8f5be46187a SHA-1: 21da7e7cb37673be30e4bbd8d78e4f0233a21bed SHA-256: 7e9d1ebc27be507cc274454cab63d45c1ee294d47c577ab183a8c9bfaabaaae2
156 Risk Score

Malware Insights

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

This PDF file is identified as malicious by multiple heuristics and a machine learning classifier, specifically flagged as a phishing trojan. It contains a large number of external links, many of which are likely part of an SEO spam or phishing campaign, directing users to various websites. The document body, though heavily corrupted, suggests a lure related to free book downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://soxebez.ru/award?keyword=dars+e+nizami+books+free+download+pdf
    • http://muparizuxufuxud.22web.org/total_money_makeover_workbook_download.pdf
    • https://cdn-cms.f-static.net/uploads/4369182/normal_60351d4b4e9df.pdf
    • https://cdn-cms.f-static.net/uploads/4483345/normal_6038deb93679d.pdf
    • https://potigaguw.weebly.com/uploads/1/3/0/9/130969810/a9cf89b0465d0.pdf
    • https://zabosete.weebly.com/uploads/1/3/1/1/131164473/lataxojabud.pdf
    • https://cdn-cms.f-static.net/uploads/4489595/normal_6056dfe550573.pdf
    • https://mitexasax.weebly.com/uploads/1/3/1/8/131857270/371e5b2.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/76262b69-207e-4e2f-baf9-3d039075445d/how_to_change_the_time_on_a_kenwood_dpx500bt.pdf
    • http://zepotusetazokor.rf.gd/best_foldable_treadmill_for_home_use.pdf
    • https://uploads.strikinglycdn.com/files/cfadaa2c-d0cc-4d3b-a2bd-a7977c58d58a/16457814934.pdf
    • https://uploads.strikinglycdn.com/files/cfcc7dcb-8772-4be4-95ea-70aca8db9297/33267337791.pdf
    • https://uploads.strikinglycdn.com/files/698446fa-2b44-412a-8304-9dbfdf5437f9/praise_and_worship_songs_gospel.pdf
    • https://uploads.strikinglycdn.com/files/2fa6da0d-5b50-4c59-8f0e-23bc16b2381a/i_am_the_messenger_book_summary.pdf
    • https://97d49ff2-d914-4ae4-8ac8-5e5cf5f77cad.filesusr.com/ugd/6350c7_34c032cedb2f48f7a184c2b9e3f3f75a.pdf?index=true
    • http://pusonaduxani.rf.gd/wonepekoxi.pdf
    • https://06ebba1c-c738-45d4-b58d-83edbdcc9420.filesusr.com/ugd/b14caa_51c445f1501247599af38ef3e0d9f3b8.pdf?index=true
    • https://uploads.strikinglycdn.com/files/ad8e6fc1-fe2e-4d54-a471-4f935e221fd8/hoover_spinscrub_max_extract_60_parts.pdf
    • https://uploads.strikinglycdn.com/files/501f5d58-ec6a-43ee-b0a3-271b87a922ce/how_to_make_a_simple_clock_at_home.pdf
    • https://uploads.strikinglycdn.com/files/8937a31a-7235-4426-99db-f0c8813e9496/what_is_the_best_vhs_to_digital_converter_for_mac.pdf
    • http://futotaze.epizy.com/59811342495.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_off0000de51.bin
00efd60cbfa6eff3f94e1a3e472bf08acbb1abd723f283400760a9a21fa019f2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDE51 5532 bytes
font_01_sfnt_off0000f129.bin
6ac1287eceb10f59f305eda1550020479521638cd1e6f4398240bc0df534332d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF129 10080 bytes
font_02_sfnt_off000113aa.bin
3c77c33bf1a73618ffc55db807ded2fa7a15e625421f2789c889d451006ccae6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x113AA 20472 bytes

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