Malicious PDF — malware analysis report

Static analysis result for SHA-256 8dcca92e22a52f6d…

MALICIOUS

PDF

65.6 KB Created: 2021-03-21 10:37:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 40238a1310e18a82317bb1747dcc71ae SHA-1: 6a011445e034fa745a31d8cceacf5cf11d8b7984 SHA-256: 8dcca92e22a52f6d9f0156aa8c7211d3160cdf8159ca6ae43fc922f430008624
126 Risk Score

Malware Insights

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

The PDF document contains multiple external links, with one prominent URL leading to a suspicious domain ('ponafet.ru') that is likely part of a phishing or scam campaign. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to redirect users to malicious content.

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://ponafet.ru/strik?utm_term=que+comer+cuando+se+tiene+el+potasio+alto PDF link annotation
    • http://xafesuvorolivig.scienceontheweb.net/vitamaster_1700_treadmill_manual.pdfIn PDF document text
    • https://cdn.sqhk.co/xenudipu/4yogjYE/vaxotusisefatejuku.pdfIn PDF document text
    • http://jekefidaz.mygamesonline.org/memakal.pdfIn PDF document text
    • https://cdn.sqhk.co/dizoketa/i1hjhiR/war_of_1812_timeline_worksheet.pdfIn PDF document text
    • https://fovojewonot.weebly.com/uploads/1/3/4/6/134669065/9691753.pdfIn PDF document text
    • https://vakenufepuxino.weebly.com/uploads/1/3/4/5/134529081/funavikipuv.pdfIn PDF document text
    • https://cdn.sqhk.co/jumuxabag/3jdjdge/adt_pulse_cost_vs_vivint.pdfIn PDF document text
    • https://cdn.sqhk.co/suwixowefa/tNTgjjg/25486839144.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/c83a55d2-1573-4d31-992f-1f4f7d9d8613/19812179508.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a6d495b7-cc43-4705-81f7-8c6dea948694/mukezamimutupolali.pdfIn PDF document text
    • https://60f6da8c-824c-4163-aae9-6195f2ac7ed4.filesusr.com/ugd/7f16bd_712a70bb7cad48d4871426a27b2acfcb.pdf?index=trueIn PDF document text
    • https://ce099f17-eb12-430b-a452-8d789b3ee5a8.filesusr.com/ugd/aef5b7_3c6be18c13f34eb781100293a710ed68.pdf?index=trueIn PDF document text
    • https://48b7024d-7414-4593-b44d-ed892b96ad15.filesusr.com/ugd/3e5db3_d2e3ecd7224a40de97be7c5d41dd29de.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/vipinib/4209202207.pdfIn PDF document text
    • https://4b5f4e46-8b81-4257-bf39-61fc08ba57b0.filesusr.com/ugd/7ea8bb_db9c1277024b4723862f377e95971f30.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/nagev/gipezulovatumiwijofevox.pdfIn PDF document text
    • https://s3.amazonaws.com/xewamejixolefaj/data_science_course_in_mumbai_quora.pdfIn PDF document text
    • http://valupakukav.myartsonline.com/99321968663.pdfIn PDF document text
    • http://nafaradevofipaf.myartsonline.com/algebra_2_practice_5-7_completing_the_square_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/jitimesolagun/mulugobowukotabe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/25070c2e-467f-47b1-986e-1d28d8289d33/cuanto_equivale_metro_cubico_en_litros.pdfIn PDF document text
    • https://s3.amazonaws.com/zumomasugipeno/59212463066.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_off0000c4d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC4D7 5280 bytes
SHA-256: a6c2c3fc3f0ddbe98a982c656802a9b7bedd9a269152dd951dc5dddc0afff9d3
font_01_sfnt_off0000d6b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6B0 9916 bytes
SHA-256: 18a07972dbbf8d897dd90813101311967e8f9cad9d80eff0971511f85b0930be

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