Malicious PDF — malware analysis report

Static analysis result for SHA-256 b68d0eb2416180a8…

MALICIOUS

PDF

65.1 KB Created: 2021-03-13 21:51:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 887710610b21f4e8f0acd3c05bbf50a5 SHA-1: d4613819e3af8c694474925f1c6ac56c5091085c SHA-256: b68d0eb2416180a8c7d66ce8b9db46a2e8fad4d3ff35e9c66b9a3d7e55b18306
126 Risk Score

Malware Insights

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

The PDF document was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to 'maypoin.ru', which is likely a phishing or malware distribution site. The document body appears to be obfuscated or corrupted, preventing a clear understanding of its specific lure, but the presence of the external URI is a strong indicator of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://maypoin.ru/wix?keyword=steampunk+background+music PDF link annotation
    • https://xegubivagemegi.weebly.com/uploads/1/3/4/4/134481439/5397142.pdfIn PDF document text
    • http://gafujovinotu.22web.org/68856673032.pdfIn PDF document text
    • http://gerawat.22web.org/barotrauma_latest_version.pdfIn PDF document text
    • http://vemasujananexu.22web.org/1326283335.pdfIn PDF document text
    • https://mizovitima.weebly.com/uploads/1/3/4/2/134266674/537280.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/ea333e14-f7b6-4fea-8e98-977319fda096/98511552308.pdfIn PDF document text
    • https://s3.amazonaws.com/sivanira/dance_dj_music_song.pdfIn PDF document text
    • http://zowetilazu.rf.gd/a_dance_of_dragons_chapters.pdfIn PDF document text
    • https://ddb0fe67-a09a-413d-b59a-c21b1dde3186.filesusr.com/ugd/3f0e57_0a04c9572d4d4414802d5ea73cea979c.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/0d77667c-a834-49ab-be61-3682bf761bba/gifimajosipe.pdfIn PDF document text
    • http://wijuweluxevem.rf.gd/81912186136.pdfIn PDF document text
    • https://s3.amazonaws.com/zategafozasiru/45037246473.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/20402ff6-2d40-4ac7-87c0-3248f9a4d244/mackie_onyx_mixer_review.pdfIn PDF document text
    • https://e0f910ba-f4aa-4d6b-87f6-24d78cda99ab.filesusr.com/ugd/cc15ef_478db46b078a4f09a7725ba7e8722708.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/podawakumepewez/tunulu.pdfIn PDF document text
    • https://s3.amazonaws.com/najipavez/how_to_install_zotero_in_word.pdfIn PDF document text
    • http://wafogaz.rf.gd/cb_background_free_hd_wallpaper_app.pdfIn PDF document text
    • http://tugefewose.rf.gd/classic_arcade_games_for_pc_free.pdfIn PDF document text
    • http://nejegidijikoj.epizy.com/schubert_liszt_standchen_piano_sheet_music.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c13f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC13F 5668 bytes
SHA-256: cf481ddb90cd176a3f5182f4ad8439867b702e4298c7c04223d518c227d079d8
font_01_sfnt_off0000d46c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD46C 9684 bytes
SHA-256: 10ab924ef109cf446fa53f18a6f2be10f82efb658a3e3e95d43553aab0e44559

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