Malicious PDF — malware analysis report

Static analysis result for SHA-256 1cbbf02df795eab8…

MALICIOUS

PDF

120.5 KB Created: 2021-04-01 05:00:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 43ba572cb369216cbc3db68f5b488e4b SHA-1: 254661de0f0457ba1e25c1fa6444e3b7e56737da SHA-256: 1cbbf02df795eab871ddad8079cd3dbc7183e7e2efd0fd197d7d79f606e9dfac
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, with a critical heuristic identifying it as a 'PDF_SEO_LINK_FARM'. One of the primary external URIs points to 'https://ponafet.ru/aws'. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. No scripts were extracted, but the structure suggests an attempt to direct users to potentially harmful external sites.

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 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://ponafet.ru/aws?utm_term=paulo+coelho+the+spy+quotes PDF link annotation
    • https://basafokadu.weebly.com/uploads/1/3/4/7/134706648/4949337.pdfIn PDF document text
    • https://rapalavosifezo.weebly.com/uploads/1/3/4/8/134886177/caeea4.pdfIn PDF document text
    • http://nozafonavuf.iblogger.org/chillar_party_full_movie_free_480p.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/5a4814be-7cb3-4847-92fa-4b6b4fc91eaf/when_start_green_revolution_in_india.pdfIn PDF document text
    • https://s3.amazonaws.com/wotodedaruzuk/57467312822.pdfIn PDF document text
    • https://s3.amazonaws.com/xomudufe/tijubifu.pdfIn PDF document text
    • https://s3.amazonaws.com/suxugipipolazog/3rd_grade_math_division_word_problems_worksheets.pdfIn PDF document text
    • https://s3.amazonaws.com/kabisebax/dell_ultrasharp_u2412m_datasheet.pdfIn PDF document text
    • https://s3.amazonaws.com/jifedefujodu/proform_110r_exercise_bike_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bb37396b-8a9e-4844-bbf9-f6c1a0777af7/does_roomba_655_have_wifi.pdfIn PDF document text
    • https://s3.amazonaws.com/fezenur/british_citizenship_application_guidelines.pdfIn PDF document text
    • https://s3.amazonaws.com/mejigavukolu/nugefu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/766056b2-ecdb-49db-830a-87c8a2aee1c5/56642044317.pdfIn PDF document text
    • http://lirifamagugo.rf.gd/base64_encode_android_studio.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/892d103c-ac0b-422c-b05a-2b384a36fab4/fokaxejomajesopawazelir.pdfIn PDF document text
    • http://wolaniloko.epizy.com/heavy_gunner_maplestory_2_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/jamuluvuvava/96742531289.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4fe66b41-7276-4d04-bb3c-c244e7ffc6ad/freak_the_mighty_full_book_summary.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/57bb8bc3-e3b4-42a8-a723-9b1075f5b2a8/51833410380.pdfIn PDF document text
    • http://kitukogoxav.epizy.com/monopoly_deal_rules_wild_card.pdfIn PDF document text
    • https://s3.amazonaws.com/lixuzo/92209743395.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off00019edf.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x19EDF 30144 bytes
SHA-256: 6b6bb025e406a69b799fcdf9835a8b7859068daac82347857d9098602be2abc5
font_00_sfnt_off00016059.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16059 5156 bytes
SHA-256: d0fcee89d79034ee433f9af6875fb65316abd713c8c2ae797dd9a34a7335dfda
font_01_sfnt_off000171f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x171F3 15172 bytes
SHA-256: 124cc821ff08fd329172ded824c65b8b7e1cf4215817dd569632a02c2b437232

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