Malicious PDF — malware analysis report

Static analysis result for SHA-256 5030213be1a81890…

MALICIOUS

PDF

79.4 KB Created: 2021-05-02 09:47:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 53ab1f37e62dc5d871bddf2b9247548e SHA-1: 00a50efbc53dce9133e3a028067e6c850c8a8353 SHA-256: 5030213be1a818901ea366e45cff43e19cca1850365b64ba2b496d985f439b18
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 domains and are structured as link farms, indicating a phishing or malicious redirection attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a spearphishing attachment designed to lead users to compromised sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://fokemale.ru/strik?utm_term=how+to+find+orion%2527s+belt+constellation PDF link annotation
    • http://harmony-market.ru/98374440513kp1bh.pdfIn PDF document text
    • https://cdn.sqhk.co/sewenajete/jggg3yz/fonulisape.pdfIn PDF document text
    • http://parhelifrl.space/dudeviludflc3l.pdfIn PDF document text
    • http://faceit.su/werufagekexuxodujjqqwh.pdfIn PDF document text
    • http://it50disconto.info/48895607130cksiz.pdfIn PDF document text
    • https://cdn.sqhk.co/tivuzofep/iaLhiDz/tijafevuxefafe.pdfIn PDF document text
    • http://testertumentum.space/ar_15_10.5in_pistol6khy0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4376382/normal_5ff2dc1243995.pdfIn PDF document text
    • http://help-copyrightservice.xyz/wisejudojinupitudejunwrtvp.pdfIn PDF document text
    • https://cdn.sqhk.co/femelofep/fO86mG1/sweet_fruit_candy_app.pdfIn PDF document text
    • https://cdn.sqhk.co/tojebaru/HieLiar/69569057809.pdfIn PDF document text
    • http://opensoda.pro/rijilakowasugu70tk0.pdfIn PDF document text
    • http://moscowflowers.shop/price_of_headlight_bulbscooht.pdfIn PDF document text
    • http://ig-mediateam.net/fotunesokmedbw.pdfIn PDF document text
    • https://cdn.sqhk.co/rikopekela/iiZBYic/82285077908.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455660/normal_605c5f6c8f179.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417808/normal_603bf40665954.pdfIn PDF document text
    • http://tekplafond.xyz/free_solfege_exercises1cfu9.pdfIn PDF document text
    • https://cdn.sqhk.co/sitopizol/uqhdje6/free_movie_downloader_app_for_pc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424953/normal_606e60bd54690.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/pevarijidasalop/81305334184.pdfIn PDF document text
    • https://s3.amazonaws.com/jolozidabi/tufakonitafezof.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_off0000f729.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF729 5244 bytes
SHA-256: 139742e556fc4d7b2197c2d591b87396e76e0a49332b991b1a54d6198b4b9aee
font_01_sfnt_off00010927.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10927 10988 bytes
SHA-256: d51d8b54e3ed8c11a55ab2bff0199615ab4a29a4de9f42fca3799ff5059fd6f8

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