Malicious PDF — malware analysis report

Static analysis result for SHA-256 077ab065bc6a6e9d…

MALICIOUS

PDF

81.1 KB Created: 2021-03-20 14:53:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8ae3559a71e053bdb84abf5290987eb1 SHA-1: 1b140b901d97ef5be7903f290a2cb0b55459bea1 SHA-256: 077ab065bc6a6e9da04b1339a1732b2f5014e6b06932b8a7fbae2337390e978a
156 Risk Score

Malware Insights

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

The PDF file contains heuristics indicating it is part of a link farm and has been flagged as malicious by ML classifiers and ClamAV. The embedded URL, 'https://resalured.ru/strik?utm_term=how+to+get+cydia+on+ios+6.1.6', suggests a phishing or scam attempt by disguising malicious content as a guide. Although no scripts were explicitly extracted, the PDF structure and external link farm behavior are strong indicators of malicious intent, likely to redirect users to further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://resalured.ru/strik?utm_term=how+to+get+cydia+on+ios+6.1.6
    • https://static.s123-cdn-static.com/uploads/4472481/normal_5fca6e9093613.pdf
    • https://cdn-cms.f-static.net/uploads/4446638/normal_6045c2801880d.pdf
    • https://cdn-cms.f-static.net/uploads/4366028/normal_602053c7544f5.pdf
    • https://cdn-cms.f-static.net/uploads/4475572/normal_6019518ad66f1.pdf
    • https://cdn-cms.f-static.net/uploads/4490736/normal_604b89516edc0.pdf
    • https://cdn-cms.f-static.net/uploads/4505837/normal_6046547770746.pdf
    • http://quickpapp.online/beats_solo_3_wireless_rose_gold_review1m35b.pdf
    • http://storeeuro.info/ruzazupofabodosujosubovennfpo6.pdf
    • https://static.s123-cdn-static.com/uploads/4414869/normal_6005a283de5e9.pdf
    • https://cdn-cms.f-static.net/uploads/4479214/normal_604ddb465ee26.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/85d0f96b-01e1-47eb-b133-759e7c48410d/fotaziza.pdf
    • https://d90bda3b-35dd-409f-9d4b-b4a00d881a52.filesusr.com/ugd/b88e3d_e5b7aa5db5f24ad1a7c5514118b5df20.pdf?index=true
    • https://uploads.strikinglycdn.com/files/705679fa-d011-4e50-a6a3-64b0edc1c92d/3130579289.pdf
    • https://uploads.strikinglycdn.com/files/6eb369d4-d0c8-4647-8420-b05358830965/10486716490.pdf
    • https://8569cc17-8b2a-4187-ace0-95b0550b99f0.filesusr.com/ugd/d6eede_26c6636f1f70447d8aa006b54a162a61.pdf?index=true
    • https://3b0fe5ff-7f86-489c-8138-fc984e51136c.filesusr.com/ugd/bfd78a_5009b92f1fd84545ab096de3d69f0f38.pdf?index=true
    • https://uploads.strikinglycdn.com/files/4e43a6df-e087-4efb-8882-be8c21ca90d5/direlewezam.pdf
    • https://uploads.strikinglycdn.com/files/6e3abaaf-00b1-44e1-bf42-386ef084d8b5/bgp_configuration_example_juniper.pdf
    • https://uploads.strikinglycdn.com/files/8ab3f7ad-3ea5-4635-9542-96cb2636c225/rexililozunuvipubovixiba.pdf
    • https://uploads.strikinglycdn.com/files/636fcf31-750e-4acd-a69e-529aa39f8318/jitilolesuz.pdf
    • https://uploads.strikinglycdn.com/files/7f1233f5-cda4-4374-aa2a-5ce2c3159d10/fnaf_the_silver_eyes_pt_br.pdf
    • https://uploads.strikinglycdn.com/files/0f4c13e5-5586-4ee8-85a8-b053945bb8e0/80794862152.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fc54.bin
326724a04a0df61d27712c68783bbf76ec4266d6f92fd3386998fd56c0345dd1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFC54 5372 bytes
font_01_sfnt_off00010ed5.bin
760d818e1249e6d8125bb2ac55352ca08117564bb65b82afb555f439a0f2845f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10ED5 12308 bytes

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