Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d235a256397093f…

MALICIOUS

PDF

76.3 KB Created: 2021-03-26 07:57:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fa896b12aa8acb916a58d3f38ebe8426 SHA-1: 54420f196021284db09e1581fb3284c89dfba3c2 SHA-256: 6d235a256397093fc2b05a677fbc915739e164a9e94de8913796441a48962a78
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with a critical heuristic identifying a link farm designed to distribute SEO-optimized PDFs. One prominent external URI, 'https://midufefew.ru/wix?keyword=dk+eyewitness+travel+guide+new+zealand', suggests a lure related to travel guides. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://midufefew.ru/wix?keyword=dk+eyewitness+travel+guide+new+zealand
    • http://fibaxoxadomi.sportsontheweb.net/38394242408.pdf
    • http://xovekofetovo.66ghz.com/53268389392.pdf
    • http://fibutogu.mywebcommunity.org/economist_cover_letter.pdf
    • http://nesakud.mypressonline.com/whitecaps_schedule_2020.pdf
    • http://rasezatoxefu.mygamesonline.org/toefl_exam_sample_test.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://b615eccc-4413-4b1d-8109-ede925130a83.filesusr.com/ugd/0994f9_6d78947fde984cfdbe2b9820d7cc9e97.pdf?index=true
    • https://uploads.strikinglycdn.com/files/46daa0f3-a758-4ee9-8fc8-42a8312a3ac4/the_penguin_anthology_of_twentieth-century_american_poetry_ebook.pdf
    • http://solezod.myartsonline.com/reflection_and_refraction_of_light_class_10.pdf
    • https://uploads.strikinglycdn.com/files/5ff12e0d-f55c-4cd1-9466-b290a7b4aa3e/roland_td-11kv_for_sale.pdf
    • http://dimexibagumaza.epizy.com/letter_w_pictures_free.pdf
    • https://uploads.strikinglycdn.com/files/9f1be8e3-7c71-4665-926d-bc67becbf5b4/70540670723.pdf
    • https://uploads.strikinglycdn.com/files/47369748-45f3-41f2-9b5f-50d845cacec2/fakaxixefirevilexi.pdf
    • https://d7179dab-c972-4501-9f4a-16044ca71e84.filesusr.com/ugd/434f74_49306915e4e84f0e923594ffc566623a.pdf?index=true
    • https://s3.amazonaws.com/fadedosi/12248540360.pdf
    • https://78e27e65-9996-4239-a63d-7a21722db537.filesusr.com/ugd/03f576_63c02c9cf64e4afb82ad27f0cd77e73f.pdf?index=true
    • https://s3.amazonaws.com/vibuvomomuv/what_does_smart_textiles_mean.pdf
    • http://gozenabuzixi.onlinewebshop.net/86313313337.pdf
    • http://ruxofepugoloma.rf.gd/wavelet_transform_for_eeg_signal.pdf
    • https://uploads.strikinglycdn.com/files/991e9edd-4123-4084-b55c-bc93ebfcba62/65776668974.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_off0000ed8f.bin
494f11cd79b5a4c383ad92487ca28d4c0a4d7a5909dc991536f3ccd38dddacbf		 pdf-font-stream PDF embedded font (sfnt) at offset 0xED8F 5360 bytes
font_01_sfnt_off00010007.bin
b211cc7843b8fe51ad25f3fa4df77261e2f011c48bc7d62803109c8eac4d238b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10007 10496 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.