Malicious PDF — malware analysis report

Static analysis result for SHA-256 6fb3ba6eb3480286…

MALICIOUS

PDF

75.6 KB Created: 2021-03-25 00:27:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 858dd2efc2c7e931d0b367e3ba0c7454 SHA-1: b42f518f8c4d3dc6df1bab3367c30572b9eaf40f SHA-256: 6fb3ba6eb3480286ad675af6ec6c52ba39af457c63ecad12d7002481124bd1ac
156 Risk Score

Malware Insights

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

The PDF file contains a lure related to fixing a washing machine error code, which is a common tactic for phishing or scam attempts. It embeds external links, one of which points to a suspicious domain 'seumenha.ru', suggesting a redirection to a malicious site. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution.

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-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://seumenha.ru/strik?utm_term=how+to+fix+lg+washing+machine+error+code+ue
    • https://cdn.sqhk.co/wowasuperan/f6higcR/oppa_doll_mod_apk_5._9._7_download.pdf
    • https://cdn.sqhk.co/vovawumusa/gcgfJha/dodgers_lakers_championship_hat.pdf
    • https://cdn.sqhk.co/wixefawoz/hcjhoif/misoxitugoba.pdf
    • https://cdn.sqhk.co/jezaziritav/gc83gi7/96694734515.pdf
    • https://mutazodot.weebly.com/uploads/1/3/0/8/130874237/2483cebaa59a.pdf
    • https://cdn.sqhk.co/dugelabomaw/jhbIDjc/block_puzzle_drop_and_classic_online.pdf
    • https://noduxulab.weebly.com/uploads/1/3/4/9/134901810/992d9b8cf33.pdf
    • https://cdn.sqhk.co/pegipoveridi/7IRkibB/learning_english_grammar_worksheets.pdf
    • https://cdn.sqhk.co/xebibugekux/OiehfpZ/texomejazutu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://f7e05ffc-afae-4d19-be15-7e9c659e5e5f.filesusr.com/ugd/72f62b_d329d98061274504a9b3dd4e936598a6.pdf?index=true
    • https://s3.amazonaws.com/vonuxagupeduze/axios_post_form_data_vue.pdf
    • https://s3.amazonaws.com/tuxutedi/dutaduvoxumujitunu.pdf
    • https://s3.amazonaws.com/megodipewukitoj/89330029699.pdf
    • https://s3.amazonaws.com/zifozujiwi/citrix_cloud_connector.pdf
    • https://s3.amazonaws.com/xoxaneral/batman_arkham_knight_mod_apk_free.pdf
    • https://7ec9ed57-df89-401a-953b-45744c150cee.filesusr.com/ugd/6e3131_4ee1789be8f342659735700ca0a71fd4.pdf?index=true
    • https://60f6da8c-824c-4163-aae9-6195f2ac7ed4.filesusr.com/ugd/7f16bd_6fce98d042714b3a87f9a61e31ce14df.pdf?index=true
    • https://s3.amazonaws.com/fukezavazuj/basic_questions_of_electrical_engineering.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_off0000eaa9.bin
81dca5d40150b491cf56357f8080b2c0940a7d1c88fc5974e6f165debb06d5b4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEAA9 5556 bytes
font_01_sfnt_off0000fd79.bin
b1c052a83ef22890d38ba4f025c380f59960d775487e1b9c397e79e60a47877d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFD79 10424 bytes

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