Malicious PDF — malware analysis report

Static analysis result for SHA-256 8fedb4dc5060f5a6…

MALICIOUS

PDF

117.0 KB Created: 2021-03-22 22:20:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 5562cbe4b6561189793b56013a3b6a8f SHA-1: 2acdbd251901f6be842cc00a4001fa9de758a821 SHA-256: 8fedb4dc5060f5a632ec967766dcec0850d76dc100eb0533f11b11eba9fcc9ea
156 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

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=watchmen+parents+guide PDF link annotation
    • http://fetizona.iblogger.org/bmw_e90_service_manual_download.pdfIn PDF document text
    • http://loveworld.club/murachs_mysql_2nd_edition_free_downloadorj3k.pdfIn PDF document text
    • http://prizinsta.site/iso_9001_certified_trains_in_indialspng.pdfIn PDF document text
    • http://moitender.org/24184563112zx3qk.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/robumuduluwise/87988612104.pdfIn PDF document text
    • https://c06d174a-caca-4ab2-b5a0-4525cd3135d4.filesusr.com/ugd/856cea_451a4eee6d6748ef8dd51f1c02983843.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jeworurowam/46146320915.pdfIn PDF document text
    • http://fukasutatota.rf.gd/19144453258.pdfIn PDF document text
    • http://linexiziretewoj.rf.gd/diplomatic_protocol_guidelines.pdfIn PDF document text
    • http://penabak.epizy.com/23066519618.pdfIn PDF document text
    • https://s3.amazonaws.com/gonima/32356693638.pdfIn PDF document text
    • https://66166ed5-207d-48ad-a5ac-83b7e977862f.filesusr.com/ugd/0d0d42_41ed6ea7846a4f7d936680ebe2a73080.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/vunizi/whose_names_are_in_the_lambs_book_of_life.pdfIn PDF document text
    • http://mekigutesazi.epizy.com/what_is_the_android_equivalent_of_siri.pdfIn PDF document text
    • https://s3.amazonaws.com/lopadivupudexa/all_expenses_and_losses_always_having_answer.pdfIn PDF document text
    • http://jaxarafepemu.epizy.com/abraham_lincoln_life_summary.pdfIn PDF document text
    • https://99470c7d-c692-4648-a7b8-36ea19db2883.filesusr.com/ugd/ab059d_bc104646a5e04941bd9062e99745e574.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/pilazi/10535874017.pdfIn PDF document text
    • https://96a9e3af-f0c3-4048-9e6c-0ad8da3c6018.filesusr.com/ugd/15d534_0489a15bd16b494c9a29187ce7c36173.pdf?index=trueIn PDF document text
    • http://dipumekamerara.rf.gd/33620397834.pdfIn PDF document text
    • http://womagemav.rf.gd/how_to_facilitate_a_cancer_support_group_california.pdfIn PDF document text
    • https://s3.amazonaws.com/belapawerezuju/29658663539.pdfIn PDF document text
    • https://d525ee04-2a40-494f-8ba9-fee52f7b18ee.filesusr.com/ugd/8b8e24_799210040c064a34a7a97da45240381b.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/pekatikisuruki/sunset_beach_background.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00017699.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17699 5468 bytes
SHA-256: ccccbd5be1cbfe563d3411156421f3f30f06d68a9bf0a4c1f135f814371c928c
font_01_sfnt_off0001890f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1890F 10940 bytes
SHA-256: ad219f02c4bcaa98ee457ec2a6c889dbf65aa0d92805c620d993b7bca842d190
font_02_sfnt_off0001aeb3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1AEB3 16416 bytes
SHA-256: cf96631f784379724622ae63351c9d35a5a19c08ac2d66cb149eb318896b45b9

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