Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee0a06b991b4dbb5…

MALICIOUS

PDF

75.0 KB Created: 2021-03-20 21:31:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: 3bbc6cd991f4e9e7f2b0ff840db87f4b SHA-1: e261bcd4fca311613bdc15c1a8fc7a97156014eb SHA-256: ee0a06b991b4dbb5f33fb41d4dd7b832b05d7b5287d26dfe9782eeba105b1792
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, with one prominent URL leading to a suspicious domain. Heuristics indicate it's a link farm on disposable hosting, and ClamAV detection confirms it as a phishing trojan. The ML classifier also flagged it as malicious with high confidence. The document body, though heavily obfuscated, appears to contain metadata related to a report, suggesting a social engineering lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://kuzutuzo.ru/strik?utm_term=corporate+social+responsibility+report+2020 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4446651/normal_5fd8b25101b9f.pdfIn PDF document text
    • http://tipografiyav.moscow/run_and_shoot_offense_madden_19it01q.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451228/normal_60542f30cb840.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464541/normal_5fd68622d281e.pdfIn PDF document text
    • http://oneitstore.info/why_my_microwave_not_workingmn1sg.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476582/normal_603802b14c98b.pdfIn PDF document text
    • http://skidki-day.site/fabalekovi0m8.pdfIn PDF document text
    • http://leqqurint.online/malisupuzivoij1jn.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446492/normal_60030252d5a39.pdfIn PDF document text
    • http://inmyshtangen.xyz/52771805733qnb2c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369323/normal_5fe7bf30c6a52.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444110/normal_6043eb2d30a6c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452148/normal_6012882493b6d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379222/normal_603795112b050.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4478923/normal_5fcbb66ed178e.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/wudibirewuduto/akai_professional_apc40_mkii_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/savifin/76074373221.pdfIn PDF document text
    • https://s3.amazonaws.com/wewiro/dreams_malayalam_movie_songs_wapmallu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d91edfc5-78b6-482d-9212-e571dc619b04/liwivasifisemeruxe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/10858a35-1208-4d11-b9d4-c2e130d94e7a/94469757318.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/37a37188-a2d2-411b-b4e0-9ef440002c75/67500921220.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_off0000e713.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE713 5348 bytes
SHA-256: 02e52ba9dd47d6edb4acfaaef9e5d2f5d847105e02c3b9a5873263c743c4b56e
font_01_sfnt_off0000f948.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF948 10924 bytes
SHA-256: 90aaf6e64e6c849609335f893b4f7028e1d9e7535e2b9f759b00c304fda70252

Open this report in the interactive analyzer, or submit your own file for analysis.