Malicious PDF — malware analysis report

Static analysis result for SHA-256 a90eb8e19b703cc2…

MALICIOUS

PDF

85.4 KB Created: 2021-05-13 22:44:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b6e8a884b848f0c4ecbf4be73ad5555e SHA-1: 7447ed1c93f856f34b6309ab6d943a46a3880804 SHA-256: a90eb8e19b703cc2f5ee67bf6622c2b868939461d8e01ad298823a3316df912b
96 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, likely intended to host a malicious payload or phishing page. The document body, though heavily obfuscated, suggests a lure related to repair costs, aligning with common phishing tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • 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://lozipotod.ru/strik?utm_term=average+cost+of+washer+repair
    • http://oneshops.space/7491208204105xut.pdf
    • https://cdn.sqhk.co/bidomutarili/gjjiAQj/the_rules_of_survival_book_review.pdf
    • https://cdn.sqhk.co/sovokeduseb/jdrjhgi/tofadeguturaduzegosusanam.pdf
    • http://creditreportfast.info/56057905837tclps.pdf
    • http://help-feedback-amzn6.xyz/cake_recipe_without_eggs_ukr8c2c.pdf
    • https://cdn.sqhk.co/rijomawonuj/hbPijMu/25527715156.pdf
    • http://martakkord.ru/9794747155f3l8d.pdf
    • http://mailedflkf.site/optical_fiber_communication_keiser_downloadb0b1l.pdf
    • https://cdn-cms.f-static.net/uploads/4413243/normal_604197cb08f4f.pdf
    • https://static.s123-cdn-static.com/uploads/4402710/normal_5fee33cc4b697.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/5cbe2e69-0254-463c-826f-ff195df54eb1/how_to_learn_spanish_for_nurses.pdf
    • https://uploads.strikinglycdn.com/files/f511b851-b0ba-42e7-9390-800386ef69a6/80947199726.pdf
    • https://s3.amazonaws.com/wudibirewuduto/call_of_duty_open_beta.pdf
    • https://s3.amazonaws.com/dazinibonofobi/plma_exhibitor_list.pdf
    • https://uploads.strikinglycdn.com/files/03f092d4-7ac5-435f-b1d0-96b2fcdb9a12/vans_old_skool_white_and_black_leather.pdf
    • http://dipobitabi.rf.gd/16958691904.pdf
    • http://damiwedokele.epizy.com/difference_between_bandwidth_and_throughput.pdf
    • https://s3.amazonaws.com/tolivajupeku/wazisamimigikirefodo.pdf
    • https://s3.amazonaws.com/jalasilunaz/59194824999.pdf
    • https://uploads.strikinglycdn.com/files/2309b9f8-1333-4835-bcc6-72170fb2490c/zurowinipumovowofuzipiwo.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000103ae.bin
3b7e89cf550e740ee3f1fd0a09674e29fd1f5a848f470e4aae3b2659e22cdb1e
pdf-font-stream PDF embedded font (sfnt) at offset 0x103AE 5068 bytes
font_01_sfnt_off00011518.bin
858de60d6c4fa42c0f74bea11ec712d37b30e8152219fe0b7f3d8b9fb3d94152
pdf-font-stream PDF embedded font (sfnt) at offset 0x11518 10912 bytes
font_02_sfnt_off00013a6f.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333
pdf-font-stream PDF embedded font (sfnt) at offset 0x13A6F 4324 bytes