Malicious PDF — malware analysis report

Static analysis result for SHA-256 bfa642461487bea8…

MALICIOUS

PDF

76.0 KB Created: 2021-02-18 04:22:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 82a342ca336197c247e5b8188481cc89 SHA-1: 0798b8928e85cb529be5eead3302206930869d48 SHA-256: bfa642461487bea85bd24a457795948bbba5f4396988bc78b331ba16e3cd8f0b
196 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for Pdf.Phishing.Trojan. The presence of a large number of external links, including an invisible link to 'ig-supportcenter.xyz', indicates a phishing or link-farming attempt. The ML classifier also strongly indicated maliciousness. The document body is heavily obfuscated, preventing a clear understanding of its direct lure, but the overall structure points to a malicious PDF designed to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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.
  • Image-heavy PDF with invisible link to suspicious domain high PDF_SUSPICIOUS_LINK_LURE
    PDF is a small image-heavy lure with invisible link annotations that send the user to a suspicious high-risk-domain URI. This matches credential-phishing carriers where the visible document is only a prompt and the real collection flow happens on the linked website.
  • 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=min+etune+manuale+italiano PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4447631/normal_5fc814f955a93.pdfIn PDF document text
    • https://ferateritilew.weebly.com/uploads/1/3/4/2/134265971/8589889.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376379/normal_601467fd4a2fa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410013/normal_600bb23d85bb4.pdfIn PDF document text
    • http://ig-supportcenter.xyz/mingling_of_souls_videosslv36.pdfIn PDF document text
    • http://igcopyrightforhelps.com/who_owns_the_ice_house_book9p028.pdfIn PDF document text
    • https://viferoxabuged.weebly.com/uploads/1/3/4/2/134235394/2313945.pdfIn PDF document text
    • http://vuxiparami.22web.org/accounts_payable_dividends_balance_sheet.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490274/normal_602034951a819.pdfIn PDF document text
    • https://muxupodijem.weebly.com/uploads/1/3/4/8/134885552/3a351966.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367271/normal_5fe24a13221d8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4402488/normal_5ff1ae571eb95.pdfIn PDF document text
    • https://lasezafokovopar.weebly.com/uploads/1/3/5/2/135294620/8926759.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408983/normal_60062a88c79c7.pdfIn PDF document text
    • http://specrazreshenie.com/familial_hypercholesterolemia_screening_guidelines1q98m.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4373304/normal_5ffaf17b36aba.pdfIn PDF document text
    • http://kihepc.xyz/29952973745mvzrd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4468537/normal_6001f58327695.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000ee63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE63 4560 bytes
SHA-256: 3080e94fd7ce9645a03fac1ebbf72727c8bbd16bedfb270fa50f572f21fabb97
font_01_sfnt_off0000fdd9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDD9 10276 bytes
SHA-256: da262b3dfb6eecd61a65e0e3e5cf42cd6a469e8d382b5832e26a09b917d4b2a0

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