Malicious PDF — malware analysis report

Static analysis result for SHA-256 c37e128384096ab7…

MALICIOUS

PDF

77.5 KB Created: 2021-01-27 09:20:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: bb179111e4209893b6187bd8bf5e7258 SHA-1: eafa437fb289f18c4027ede743e5754db0e97df1 SHA-256: c37e128384096ab775edc341059ce1309cc20cc817528612fda3a037320f55db
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to disposable hosting services and are likely part of a link farm designed to redirect users. The document body, though heavily obfuscated, suggests a lure related to a 'zombie hunter sniper' game, indicating a potential attempt to trick users into downloading a malicious application. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to 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 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://druttle.ru/wb?keyword=zombie%20hunter%20sniper%20last%20apocalypse%20shooter%20apk PDF link annotation
    • https://gexuxufe.weebly.com/uploads/1/3/1/4/131406387/42b9dc.pdfIn PDF document text
    • https://nifatukipukixe.weebly.com/uploads/1/3/1/3/131398430/loxinerizul.pdfIn PDF document text
    • https://xijafidul.weebly.com/uploads/1/3/2/3/132303061/gejegesujodomuz_zibowat_xelovi.pdfIn PDF document text
    • https://mobuverafawez.weebly.com/uploads/1/3/5/3/135346795/gewunilelovinon-pomam-bedukigu-xubofomebenopen.pdfIn PDF document text
    • https://kitomejefu.weebly.com/uploads/1/3/4/1/134108571/3547809.pdfIn PDF document text
    • http://befemuvejizu.22web.org/22697478025.pdfIn PDF document text
    • https://simokenuma.weebly.com/uploads/1/3/5/3/135311421/gewop.pdfIn PDF document text
    • https://xawizavikerid.weebly.com/uploads/1/3/4/5/134525990/9781668.pdfIn PDF document text
    • https://cdn.sqhk.co/sesijisova/sgh41ig/wuzabetuf.pdfIn PDF document text
    • https://xajakubadom.weebly.com/uploads/1/3/0/8/130874473/1b135d1.pdfIn PDF document text
    • https://cdn.sqhk.co/mujowofapubi/iBJdvHk/nba_g_league_salary_2019.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
    • http://tosopipates.epizy.com/dabafoxivivo.pdfIn PDF document text
    • http://rosuwofa.rf.gd/pubakajapem.pdfIn PDF document text
    • http://nanesipub.rf.gd/autologous_blood_donation_guidelines.pdfIn PDF document text
    • http://rujemivegelap.epizy.com/42443424816.pdfIn PDF document text
    • http://zazisuj.epizy.com/hiragana_test_sheet.pdfIn PDF document text
    • http://metivatozu.epizy.com/7686764343.pdfIn PDF document text
    • http://kexomuradalo.rf.gd/apache_friends_xampp_version_1._8._3.pdfIn PDF document text
    • https://s3.amazonaws.com/doxifuba/yearns_crossword_puzzle_answer.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_off0000e415.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE415 5320 bytes
SHA-256: 48b68722c9c057954df9d8da242db290c133e9d31c3bda22a98ec39c0c387cf0
font_01_sfnt_off0000f605.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF605 10616 bytes
SHA-256: 0d59c5678483d504d200c431b002c086aba89bac2261e21631d574719adc67d3
font_02_sfnt_off00011a70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A70 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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