Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ae6ac1397779c60…

MALICIOUS

PDF

74.2 KB Created: 2021-02-27 09:28:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 85714ef951453f1a02f436853decdfe9 SHA-1: d0a1c5c64a8e173e92970853ae56b89f6418bc05 SHA-256: 6ae6ac1397779c6000e13523f7024d3696752062924f372042b1811065b358e1
126 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, many pointing to disposable domains or link farms, suggesting a phishing or malware distribution scheme. The document body, though heavily obfuscated, contains keywords related to 'astrological compatibility on snapchat' and references 'wkhtmltopdf', indicating a lure to external content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://zajinet.ru/wb?keyword=how%20to%20see%20astrological%20compatibility%20on%20snapchat PDF link annotation
    • https://lurufakezudaka.weebly.com/uploads/1/3/4/8/134884294/morutibagefo_fomid.pdfIn PDF document text
    • https://cdn.sqhk.co/zogowefu/5jfgfhd/akinator_download_pc.pdfIn PDF document text
    • https://diwijavel.weebly.com/uploads/1/3/4/6/134691177/1097302.pdfIn PDF document text
    • https://cdn.sqhk.co/xijogedobu/spoYige/6046277215.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462059/normal_5fd7b71449b8e.pdfIn PDF document text
    • https://modagifamu.weebly.com/uploads/1/3/5/3/135341464/fewubotapo_kasewiz.pdfIn PDF document text
    • https://cdn.sqhk.co/todiwapubu/jDfijdx/space_battleship_yamato_2202_myanimelist.pdfIn PDF document text
    • http://soraguloloj.iblogger.org/lebeporapewaforekupevuda.pdfIn PDF document text
    • https://ribafiligizeki.weebly.com/uploads/1/3/1/4/131438260/2764763.pdfIn PDF document text
    • http://vasowenotaruso.22web.org/82355292175.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4427519/normal_5fcb175084ba7.pdfIn PDF document text
    • https://sifejolo.weebly.com/uploads/1/3/1/4/131410009/3063654.pdfIn PDF document text
    • https://mifadumuvuvog.weebly.com/uploads/1/3/4/6/134689338/2859717.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454167/normal_6003ec850e6d7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445119/normal_5fcdff1ba6e72.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://panadokopejed.epizy.com/siburetufuxesew.pdfIn PDF document text
    • http://zapofekeba.rf.gd/riledafinovisolomofanex.pdfIn PDF document text
    • http://fozajekipijijax.epizy.com/ca_foundation_reference_books.pdfIn PDF document text
    • http://jefiwimagi.epizy.com/25482311868.pdfIn PDF document text
    • http://gexusapinofuvep.epizy.com/antimicrobial_activity_of_acacia_nilotica.pdfIn PDF document text
    • http://nufukajipopo.rf.gd/android_sdk_version_19_xposed.pdfIn PDF document text
    • http://jojudodadanu.epizy.com/voice_recorder_apk_mod.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_off0000e477.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE477 5644 bytes
SHA-256: 298dfe792ccaaf18ddc52d10cc619a96ab4d7565196b33013b51261d2dc9ae60
font_01_sfnt_off0000f793.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF793 10228 bytes
SHA-256: 9bf83950a5d348d2910210428363da171a79ff1211639d4c9f32668b105b1b21

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