Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc379fe74ceac60a…

MALICIOUS

PDF

76.8 KB Created: 2021-03-28 00:36:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: eeb81e34dffc67c4a2ab61a1accf422b SHA-1: 3c4f187e3b0aa9d17ea502ffdf5a17d845c573d2 SHA-256: cc379fe74ceac60a18cc76e394cea3bee93ca2746cbfcc650419b15b09f534b9
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF document was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, with one prominent URL pointing to a site offering a 'driver booster pro latest version', suggesting a lure for users seeking software. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a pattern of using disposable hosting for link farms, further supporting a malicious intent.

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://gimoguvi.ru/123?utm_term=driver+booster+pro+latest+version PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4479902/normal_5fe80e18a01d2.pdfIn PDF document text
    • http://lozipazom.sportsontheweb.net/xarubirewizikotujoketex.pdfIn PDF document text
    • https://tenagudewujuga.weebly.com/uploads/1/3/1/1/131164273/c79e65a9c72bc.pdfIn PDF document text
    • https://cdn.sqhk.co/pasepizut/jeH4poc/find_the_hidden_objects_printable_easy.pdfIn PDF document text
    • https://rosififobagas.weebly.com/uploads/1/3/1/1/131164218/jiruzulemobe.pdfIn PDF document text
    • http://wisalifo.22web.org/koxitodopebuzitojol.pdfIn PDF document text
    • https://cdn.sqhk.co/pifajaloro/XgLgfgg/pocket_frogs_chroma_2018.pdfIn PDF document text
    • http://galapokebalanu.22web.org/88253577448.pdfIn PDF document text
    • https://finedogu.weebly.com/uploads/1/3/4/7/134749629/gazodevoxapare.pdfIn PDF document text
    • https://cdn.sqhk.co/kidatufo/8hcidz7/ultimate_ninja_blazing_apk_offline.pdfIn PDF document text
    • https://tutitobogin.weebly.com/uploads/1/3/4/4/134485970/5067956.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445550/normal_603995f634cbf.pdfIn PDF document text
    • http://lofajemami.sportsontheweb.net/79006908426.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454968/normal_6024f11bb2876.pdfIn PDF document text
    • https://cdn.sqhk.co/gufojakig/tghRigo/44053611587.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/lowuwofuxali/57198007208.pdfIn PDF document text
    • http://lokimutopilar.epizy.com/266059580.pdfIn PDF document text
    • http://liduvitulugug.onlinewebshop.net/how_do_i_reset_my_neato.pdfIn PDF document text
    • https://s3.amazonaws.com/kokesatodixon/solo_vpn_apk_for_pc.pdfIn PDF document text
    • http://xividusu.epizy.com/12570511648.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_off0000edb5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDB5 5012 bytes
SHA-256: b50cde0463ac32e0a502919604d53141be3948d25a3a013e7c84e3861d423d2c
font_01_sfnt_off0000fed3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFED3 11452 bytes
SHA-256: da7e812cfa301e9933e55c95ad791eac6571a9e7cd344b4a768df8c7d6dbabac

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