Malicious PDF — malware analysis report

Static analysis result for SHA-256 6a7c7aab92ff72b5…

MALICIOUS

PDF

78.6 KB Created: 2021-01-19 14:29:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 9ad38d43028fa3c51257c14675b1ed44 SHA-1: 2b4ac913d13672a4baa3b84cc62b9a7ebf52448b SHA-256: 6a7c7aab92ff72b55c1fe1f3a28f7766742ebfd97be2c6d3523ab81d35ccd0c6
184 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'traffmen.ru'. The document body, though heavily obfuscated, suggests a lure related to 'Attributes of the holy spirit bible', likely intended to trick users into clicking the malicious link. The ML classifier also strongly flagged this PDF as malicious, supporting the phishing and redirection attack pattern.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://traffmen.ru/123?utm_term=attributes+of+the+holy+spirit+bible In PDF document text
    • https://mamexobupelo.weebly.com/uploads/1/3/1/3/131383482/favorufavewivepeje.pdfIn PDF document text
    • http://wupofifaxixusi.66ghz.com/burning_bright_full_movie_free.pdfIn PDF document text
    • https://denonifo.weebly.com/uploads/1/3/4/7/134709080/vegamamupefikomu.pdfIn PDF document text
    • https://sofepusususe.weebly.com/uploads/1/3/1/6/131636682/rusuto-vufodiriwo-bobagezinasoj-gadukizofezej.pdfIn PDF document text
    • https://pepisukuwen.weebly.com/uploads/1/3/1/6/131606293/fotikilolusiregofif.pdfIn PDF document text
    • https://site-1182839.mozfiles.com/files/1182839/smokin_ball_bowling_2nd_hand.pdfIn PDF document text
    • https://batatifenosi.weebly.com/uploads/1/3/4/5/134513642/zojajegozaxobares.pdfIn PDF document text
    • http://runatem.66ghz.com/great_is_thy_faithfulness_piano_sheet_music.pdfIn PDF document text
    • https://belonimilulufaf.weebly.com/uploads/1/3/4/4/134403367/59f4696.pdfIn PDF document text
    • https://pudisipilusive.weebly.com/uploads/1/3/4/5/134597375/2567633.pdfIn PDF document text
    • https://fuxomuvepanagal.weebly.com/uploads/1/3/4/6/134611725/766278.pdfIn PDF document text
    • https://wekubuzebebam.weebly.com/uploads/1/3/0/7/130739705/wixomewev.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/gupawupigawono/vegolafenudo.pdfIn PDF document text
    • https://s3.amazonaws.com/gixawetopoli/59516958576.pdfIn PDF document text
    • http://sarirepenibe.epizy.com/xedizuluvodevak.pdfIn PDF document text
    • http://losisotudek.epizy.com/ijcars_latex_template.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_off0000f979.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF979 5012 bytes
SHA-256: 39eabb718dd072f328f39c9cb2dcf179fe0733be6511e68633798798da6fe184
font_01_sfnt_off00010a87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A87 10144 bytes
SHA-256: d8b9f684fbfd8742c39835f802ca25209056ee15772d0758950951d15bf76ef0

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