Malicious PDF — malware analysis report

Static analysis result for SHA-256 3132bbc70d2a12da…

MALICIOUS

PDF

76.4 KB Created: 2021-03-29 21:57:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: f07cd719d9c9a7b383911666d8a8796c SHA-1: 7a12001c4dc1e266175e3fcf805c52297bfafd3e SHA-256: 3132bbc70d2a12da0c7a1ef8479bf418e9e89442aa7300e9bff4207d23ef51b8
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains embedded URLs, one of which, 'https://lozipotod.ru/wix?keyword=gta+4+apk+download+uptodown', is presented as a lure for downloading software. The file was flagged by ClamAV as 'Pdf.Phishing.Trojan' and ML classifiers indicated a high probability of maliciousness. The presence of multiple external URIs and the link farm heuristic suggest a phishing or malware distribution attempt.

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://lozipotod.ru/wix?keyword=gta+4+apk+download+uptodown PDF link annotation
    • http://naxiramomamaz.66ghz.com/xafosimexagigige.pdfIn PDF document text
    • http://paxebuli.iblogger.org/ipad_annotation_app.pdfIn PDF document text
    • http://on-arenas.com/sezewavedelax9viz.pdfIn PDF document text
    • http://frut-tree.site/bofinirdey2a.pdfIn PDF document text
    • http://about-central.com/75313527200lulb7.pdfIn PDF document text
    • http://gonojokolekovo.22web.org/is_brother_dcp-7065dn_wireless.pdfIn PDF document text
    • http://probkin34.xyz/1348803864962gb6.pdfIn PDF document text
    • http://muldwych.com/3065759068lo19t.pdfIn PDF document text
    • http://lasns.fun/centos_terminal_commands1ursa.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/424742dd-97bb-484c-a108-d7eaaab0078f/carrier_apu_wont_turn_on.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/175562ad-8212-4943-a28b-a03a5cf6d087/26250361259.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/79a904e4-fe51-4787-a2fc-19a4f0368c88/how_writing_works_jordynn_jack.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fc0f1e4d-daee-4b6b-a9d4-41dcdc457039/very_hard_harry_potter_movie_quiz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2932e2f6-9c4d-43df-b0a9-e2144c7f5259/2869365978.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/33f3fdbe-7991-4d11-91c8-e780fe44bc4f/anet_a8_settings_for_cura_4.0.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9d84ace5-abe7-4779-a357-1ef86d28607b/dolij.pdfIn PDF document text
    • http://rizukapusapanom.rf.gd/sadebotilopib.pdfIn PDF document text
    • http://reginujijuf.rf.gd/cfa_institute_investment_foundations.pdfIn PDF document text
    • http://zipoxibel.epizy.com/9406657706.pdfIn PDF document text
    • http://dimafox.epizy.com/bleacher_report_liverpool_barcelona.pdfIn PDF document text
    • http://naxaxibo.rf.gd/6450616436.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_off0000e3b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3B7 4952 bytes
SHA-256: b49ee19926177d846a8a344fbc746e608f81d9511e4384534aa5264cb025e622
font_01_sfnt_off0000f4c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4C9 22044 bytes
SHA-256: a40eddefce3c41e2ec14e3a36ccfce6f933866d4ddd8fefc2fcd05e829ceb5c4

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