Malicious PDF — malware analysis report

Static analysis result for SHA-256 25769134365af9eb…

MALICIOUS

PDF

82.9 KB Created: 2021-03-31 14:55:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 24d7cd41db0ae4aef4352969be043085 SHA-1: 7cc44314b4c5a59c8351f8255ba22a40691cf9f4 SHA-256: 25769134365af9eb1102512d996e8f83ad7c2b90126154047e8326b360ce1e24
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to other PDF files hosted on various domains, indicating a link farm. The primary URL suggests a lure related to 'Sumerian tablets vs bible pdf'. ClamAV and ML classifiers strongly indicate maliciousness, specifically a phishing or trojan-like behavior. No scripts were extracted, but the structure suggests the PDF is designed to redirect users to malicious or phishing websites.

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://jumiwimov.ru/award?keyword=sumerian+tablets+vs+bible+pdf
    • https://cdn.sqhk.co/vogoxaginoje/anhbha0/9818762845.pdf
    • https://cdn.sqhk.co/jatobeguji/iiggjj3/10079966283.pdf
    • https://cdn.sqhk.co/fopeziriga/hda4Tji/end_of_days_lyrics.pdf
    • http://raxanoxev.22web.org/lexus_rx_350_price_in_nigeria_2010.pdf
    • https://xotototovizeta.weebly.com/uploads/1/3/2/3/132303406/a34068e94c4.pdf
    • http://lixixivukagoda.66ghz.com/pnu_biological_science_let_reviewer.pdf
    • https://pajilolupifi.weebly.com/uploads/1/3/2/3/132302794/7280187.pdf
    • https://cdn.sqhk.co/tirabipati/iiAihYD/blade_and_soul_modding_guide.pdf
    • https://cdn.sqhk.co/muwanije/gfu9igq/75963378828.pdf
    • https://cdn.sqhk.co/leredupodeka/gdsSqsI/codycross_crossword_puzzles_mod_apk.pdf
    • https://cdn.sqhk.co/dokijesu/ejiBcSN/tajidejevotukotapo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://narolojekidutaj.rf.gd/57759398324.pdf
    • https://s3.amazonaws.com/kofabube/907763960.pdf
    • http://givorajosi.rf.gd/42986032109.pdf
    • https://s3.amazonaws.com/piradi/11342639903.pdf
    • http://sidunutisa.epizy.com/dark_web_unblocked.pdf
    • http://lusavudipanu.epizy.com/30813865048.pdf
    • https://s3.amazonaws.com/paropabaru/westminster_shorter_catechism_number_87.pdf
    • https://s3.amazonaws.com/sagotomagin/61883840518.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fbf7.bin
e393b0881cfe1213b517d12194c454c840f10a88ad79b8390b91570bd522ec45		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFBF7 5264 bytes
font_01_sfnt_off00010db2.bin
9a03b2052d75b86fa79833d329de293b5344aa85ec5e54b2d8da21adc388c4ef		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10DB2 10204 bytes
font_02_sfnt_off0001308f.bin
7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1308F 4324 bytes

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