Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c758490bea8f02a…

MALICIOUS

PDF

111.1 KB Created: 2021-05-21 21:40:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d2f43e564462cba4e7d53e776a32409d SHA-1: 2967982e41282e1ea055ef744b8c4d6ca2913ffd SHA-256: 1c758490bea8f02adc7addc9c0078afe1d042eb81ef918ca7e57febc7e41a89e
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF file was flagged as malicious by a ML classifier and ClamAV, indicating a high likelihood of malicious intent. The PDF contains a large number of external links, many pointing to Weebly-hosted PDFs, which is characteristic of SEO link farm abuse. One of the primary external links, 'https://ponafet.ru/strik?utm_term=how+do+you+play+sorry+revenge', suggests a lure or redirection to malicious content. The presence of urgency language further supports a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9963

Heuristics 6

  • 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
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://ponafet.ru/strik?utm_term=how+do+you+play+sorry+revenge
    • https://fuxilidunud.weebly.com/uploads/1/3/5/3/135314653/6008656.pdf
    • https://disaximineta.weebly.com/uploads/1/3/4/8/134883765/eacb07f12af2ca.pdf
    • https://kalabuzamebuku.weebly.com/uploads/1/3/4/3/134339718/70aab8e9db03.pdf
    • https://rebenanutizoder.weebly.com/uploads/1/3/4/7/134752372/dotosuxekide.pdf
    • https://bigikudas.weebly.com/uploads/1/3/0/7/130775628/5762690.pdf
    • https://girosunemakafe.weebly.com/uploads/1/3/0/7/130739351/livijuvagujo_vokerigit_vateru.pdf
    • https://wunurobi.weebly.com/uploads/1/3/4/8/134881210/lafiluvukupesamuxima.pdf
    • https://jukaninigureze.weebly.com/uploads/1/3/0/7/130738482/midinisugob.pdf
    • https://jupedozezuwobig.weebly.com/uploads/1/3/4/0/134040413/5ad38f939b91.pdf
    • https://mudobimug.weebly.com/uploads/1/3/4/8/134853100/tagokuwos.pdf
    • https://gitakitopawal.weebly.com/uploads/1/3/5/3/135325500/vedulugaj_dawas_satujolelej.pdf
    • https://katodelof.weebly.com/uploads/1/3/6/0/136051175/219f3d4cc8f0.pdf
    • https://divamokavagi.weebly.com/uploads/1/3/4/8/134871471/136049.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/topipovikapari/87699490102.pdf
    • https://s3.amazonaws.com/tawosutosuxi/business_english_for_beginners_a1_a2.pdf
    • https://s3.amazonaws.com/bipepezuwed/anime_glare_ios.pdf
    • https://s3.amazonaws.com/biwuwukesazef/sesotho_music_video.pdf
    • https://s3.amazonaws.com/zuniverijesud/97757442333.pdf
    • https://s3.amazonaws.com/gogunabones/sekafunogebekisuni.pdf
    • https://s3.amazonaws.com/tuxutedi/backstage_pass_achievement_guide.pdf
    • https://s3.amazonaws.com/sisaxu/reruratirulexetenev.pdf
    • https://s3.amazonaws.com/wazotojemov/gowunip.pdf
    • https://s3.amazonaws.com/dobesogum/pifege.pdf
    • https://s3.amazonaws.com/warapagefasovi/carnatic_songs_lyrics.pdf
    • https://s3.amazonaws.com/ruzaganog/rockwell_1769-l33er_manual.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001469b.bin
a8f773ecd19bc43de1b7e3d4dd5f0e1776a23f5483c324c50353957f7f285666		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1469B 5096 bytes
font_01_sfnt_off0001580b.bin
446fc7d472d2f05d4a54df889f2ba2ea5ecaf2bd181311c9bf66751d450a3b2f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1580B 4120 bytes
font_02_sfnt_off000162fb.bin
e1a819bfe0a42b4e0f79d68e8f232d26bd0f64f1ade5c9c39b9bbad15c948cb0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x162FB 11492 bytes
font_03_sfnt_off00018a66.bin
7960312706b4b6b80d6c1a02ea1d86f4abfcd1c95e1c992a0b0d227df3d9580a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x18A66 16208 bytes
font_04_sfnt_off00019fa0.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x19FA0 4324 bytes

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