Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ec4ff69565c2065…

MALICIOUS

PDF

119.3 KB Created: 2021-03-11 17:38:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 26059af83b4b07d39d89484e35634bd7 SHA-1: ba7abb6f7aef20ce0bd23d84754ce93976d353f8 SHA-256: 7ec4ff69565c20652561716a321bb48d3af1b89fa59b04170e7135bfa696cf06
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file contains a large number of external links, many hosted on disposable domains, indicating a link farm or SEO manipulation tactic. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded URLs point towards an attempt to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://bologen.ru/wix?keyword=three+body+problem+physics+pdf PDF link annotation
    • http://fuviguz.22web.org/what_is_aggregate_planning_strategies.pdfIn PDF document text
    • https://kumexaper.weebly.com/uploads/1/3/4/8/134882622/nalekozota.pdfIn PDF document text
    • http://pifovabu.getenjoyment.net/45662098404.pdfIn PDF document text
    • https://xitarowax.weebly.com/uploads/1/3/2/6/132681505/1b4cb8f2d884187.pdfIn PDF document text
    • https://fakebomazeb.weebly.com/uploads/1/3/1/4/131453402/7420054.pdfIn PDF document text
    • http://suraneb.scienceontheweb.net/vafenegevirefixumoroxoben.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://11ca5eb4-0abe-4d5d-8073-3f36f6088e80.filesusr.com/ugd/8b62d8_8cebcae070964b2c8e2d12f4dbba33b5.pdf?index=trueIn PDF document text
    • https://584abdf6-e408-48d3-a53c-4313a8f82471.filesusr.com/ugd/18ee90_5d5af56408b74b548680bcf03e17d0fd.pdf?index=trueIn PDF document text
    • http://pokitudid.epizy.com/11770497444.pdfIn PDF document text
    • http://rogofideb.onlinewebshop.net/limopojokagazenolipulidin.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/95acbc1d-8619-47c3-886f-da6ebfa0b4f4/62869261669.pdfIn PDF document text
    • https://68f06c25-eb64-4e0a-94e3-a0e33e610147.filesusr.com/ugd/463ace_d4655ea9cfb745a7b9b3ac859ed6754b.pdf?index=trueIn PDF document text
    • https://a62e46b8-d933-4087-892c-e5439cec6991.filesusr.com/ugd/e9cba9_efab379a4daf4784abc67e83af2be596.pdf?index=trueIn PDF document text
    • https://5548a280-a194-4776-8019-0e256783c1fa.filesusr.com/ugd/f2c1dc_b8d3084194d24bd3a63cd65e449b8087.pdf?index=trueIn PDF document text
    • http://dowinoxerirud.epizy.com/zenotazuwi.pdfIn PDF document text
    • https://c183b790-cb34-49aa-848e-1a9f2b14dda3.filesusr.com/ugd/d8966e_354e2e3d2cba4e2da7281988ff2deb95.pdf?index=trueIn PDF document text
    • https://53ebb62d-ddaf-432f-8dc3-1f4746653467.filesusr.com/ugd/bbd3cf_a31cf67f37fe4d389f39d01a4f353d04.pdf?index=trueIn PDF document text
    • http://gifidabula.atwebpages.com/jiwonaside.pdfIn PDF document text
    • https://ec08fec6-e576-400d-8504-372613838d3c.filesusr.com/ugd/57e0ce_f422e095fe394edaab63c529a193efef.pdf?index=trueIn PDF document text
    • http://xogijowag.onlinewebshop.net/wawafafutediwejizara.pdfIn PDF document text
    • https://7e005a1c-fb68-43c1-af83-b854b6a2d282.filesusr.com/ugd/dcfb95_97216c566b2e4535b4ca83a3eb19f24f.pdf?index=trueIn PDF document text
    • http://bekogizob.epizy.com/nagisu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/50c48536-fb21-414b-b5c3-29a7f49913d1/muwikaxux.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cab3d268-fa38-4215-b55d-4fb5d80161de/binobozinojagav.pdfIn PDF document text
    • https://d1159ab4-cbf5-42eb-897b-83a5e94cd7da.filesusr.com/ugd/536122_c970be6f91814e33b27e5b668a32b619.pdf?index=trueIn 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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00017ce4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17CE4 5376 bytes
SHA-256: bc9fc8531027391a6da338e389933ae74c3e9e2a080d01131876aaefefd92ec5
font_01_sfnt_off00018f0c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18F0C 12372 bytes
SHA-256: ddf3fe15527d73c93f02cafbf39952b0a125834329debff4e3682309e8216795
font_02_sfnt_off0001b98f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B98F 16148 bytes
SHA-256: 15a8cd187b39d93b3ad810dac1d9393cbc089bc36a82a57c6fe6195549fe55c2

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