Malicious PDF — malware analysis report

Static analysis result for SHA-256 b73f7f80149b66b7…

MALICIOUS

PDF

77.4 KB Created: 2021-03-16 04:45:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: ecddb7f47a81bb7902bafabd1e13c8d6 SHA-1: 5698ff5c01e317ff9ed5f627b3759c9994203d5c SHA-256: b73f7f80149b66b7200d53169c96c18dd40a9699a9d3898db60942bc087c8a73
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 direct users to malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically phishing or trojan distribution. The embedded URL points to a suspicious domain, likely serving as a lure for further malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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 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.
  • 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://jumiwimov.ru/123?utm_term=ic+cd4049+datasheet+pdf PDF link annotation
    • http://kuzegajozux.iblogger.org/interview_questions_and_sample_answers_in_french.pdfIn PDF document text
    • http://zdorovie-vashe-vse.xyz/60919619295nt13x.pdfIn PDF document text
    • http://appless.space/clean_code_a_handbook_of_agile_software_craftsmanship_redditofsd7.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/tixedujegibex/what_is_color_psychology.pdfIn PDF document text
    • https://s3.amazonaws.com/tomamujuf/cambridge_4_listening_test_2_answers.pdfIn PDF document text
    • https://cd70d4e5-4a1a-4071-96d1-f2415ea5ece1.filesusr.com/ugd/7f46b5_5afffe622eb5456e9f3b17b1fc5b2d20.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/padosumifubobo/53352137800.pdfIn PDF document text
    • http://medesawawolujim.epizy.com/39206520120.pdfIn PDF document text
    • https://s3.amazonaws.com/popisiburewixuj/rarudaduse.pdfIn PDF document text
    • https://s3.amazonaws.com/rupatojuko/63717120954.pdfIn PDF document text
    • https://2e4d99de-9d37-4ce2-abd5-0bbccafdbe51.filesusr.com/ugd/33a2e4_46c71872f14b4039a1ac1559945a45e6.pdf?index=trueIn PDF document text
    • https://1ebfeea1-7d02-43b8-8f0a-002c87bc7f75.filesusr.com/ugd/50dcf6_fdb1553de8fd4f60bd4582e7fd94030a.pdf?index=trueIn PDF document text
    • http://wuduzinemaz.rf.gd/47098155906.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d5f9d861-f5bd-4ea8-9cd3-c5959fe90426/xilitarofoveto.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/74fd3155-550d-4c3d-8bd5-b44970b5822f/tuvaxixa.pdfIn PDF document text
    • https://s3.amazonaws.com/xasovewipeje/kufisowok.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/77bf442d-60f1-4d83-80f3-4a013072b7fb/fupemivogepogugalinisad.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9d471e98-5043-4377-b58f-df0b1bfc263c/sea_of_monsters_wikia.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/77239601-d8ae-41b3-addd-578c84f9f014/71823111652.pdfIn PDF document text
    • http://juvupakevunume.rf.gd/54802661504.pdfIn PDF document text
    • http://lunurubu.rf.gd/antigona_gredos.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dbfd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBFD 4324 bytes
SHA-256: de2d336ebd8b1c032a7f77641a66d39bd0ac2e011c226ef7a3aa13429d4b5b16
font_01_sfnt_off0000eb4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB4B 5440 bytes
SHA-256: 958ee0e1d3c6853b3c48ede3edf3cb6fea51109fc5f183c17707d09b9b428339
font_02_sfnt_off0000fdd0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDD0 13152 bytes
SHA-256: 639c5e2e073a18f9a329684c49122ba9197f8b3037327a0421fcb55d0cef2d2a

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