Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ac1f519670ed8a3…

MALICIOUS

PDF

79.3 KB Created: 2021-02-20 21:18:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 9de54ec8bfeef024d367d1a46a8d90da SHA-1: 22e13b09d0ad86460f8d8d5dccabd28b1b2f6efe SHA-256: 9ac1f519670ed8a36a529feddfe1ca3da7d90d2b83a4b918aae1f4996c264355
156 Risk Score

Malware Insights

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

The PDF file was identified as malicious by ClamAV and an ML classifier, with heuristics indicating it contains a link farm and external URIs. The document body, though partially corrupted, suggests a lure related to 'Mothers day inspirational quotes'. The primary malicious activity appears to be redirecting users to external URLs, likely for phishing or malware distribution.

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 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.
  • 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://bologen.ru/123?utm_term=mothers+day+inspirational+quotes+in+english PDF link annotation
    • https://fusajebotiv.weebly.com/uploads/1/3/4/3/134320253/fc2abd2ec74.pdfIn PDF document text
    • http://riniwovefaraw.22web.org/48716317229.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383327/normal_6011e3f9952c2.pdfIn PDF document text
    • https://ruzuwigowan.weebly.com/uploads/1/3/1/4/131453288/6773964.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413968/normal_5ff675c2731cb.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/gimisorixosu/42315203469.pdfIn PDF document text
    • https://s3.amazonaws.com/batoragubukepo/high_graphics_offline_android_games.pdfIn PDF document text
    • http://tidegofavinugaw.epizy.com/pokemon_battle_usum_game_for_android.pdfIn PDF document text
    • https://s3.amazonaws.com/ragejufa/27586434809.pdfIn PDF document text
    • https://s3.amazonaws.com/jeduzizonox/excuse_letter_sample_format.pdfIn PDF document text
    • https://s3.amazonaws.com/zoromexemuzid/bhagavad_gita_chapter_2_verse_47_in_kannada.pdfIn PDF document text
    • https://s3.amazonaws.com/pubopelej/benukujuledi.pdfIn PDF document text
    • https://s3.amazonaws.com/wavunot/bambara_kannaley_movie_in_tamilyogi.pdfIn PDF document text
    • https://s3.amazonaws.com/boduxatavepe/zaximojemimadijezarazezap.pdfIn PDF document text
    • https://s3.amazonaws.com/vogubivajavofu/vajamotuperulisinus.pdfIn PDF document text
    • https://s3.amazonaws.com/xebuvuwov/books_to_read_in_2019.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e8e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8E2 5336 bytes
SHA-256: a18f7737cfceb1e977674dcc826db9f8f3c476d8700d31935f1273e2923f5852
font_01_sfnt_off0000fb06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB06 10816 bytes
SHA-256: ef2fcf5ef1aad54e21ce067669905bbe0736735ed4a6f228e5e649705f5b00fb
font_02_sfnt_off00011fd2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FD2 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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