Malicious PDF — malware analysis report

Static analysis result for SHA-256 67b5083d652b44b7…

MALICIOUS

PDF

75.2 KB Created: 2021-03-06 15:49:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-13
MD5: 4278585361e3513901d33a891b0b4a98 SHA-1: 71e148d97f2b70b2ebe3cd69e56c4c06140a005e SHA-256: 67b5083d652b44b75221350ba67cd7d999d4655801f9d7ee754eb168974eb270
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many hosted on disposable domains, indicating a link farm or SEO manipulation tactic. ClamAV detected it as Pdf.Phishing.Trojan, and ML classifiers also flagged it as malicious. While no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's intended to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 6

  • 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.
  • 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/wix?keyword=craigslist+sites+michigan PDF link annotation
    • http://leziwazedo.mypressonline.com/sovudokijikewana.pdfIn PDF document text
    • https://munowimil.weebly.com/uploads/1/3/1/4/131406650/1748761.pdfIn PDF document text
    • http://sudilufib.getenjoyment.net/quadratic_equation_calculator_wolfram.pdfIn PDF document text
    • https://polavimiwusirew.weebly.com/uploads/1/3/2/6/132681763/sixuvadozurofafefe.pdfIn PDF document text
    • https://funogefoxareso.weebly.com/uploads/1/3/4/0/134041001/xumox-nixirubirodasog-zegejiputexex-neverepelut.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://a7193630-a032-4ee2-b136-33837135b76a.filesusr.com/ugd/fac845_25aec97eb7734339bcc2fc1195a6059d.pdf?index=trueIn PDF document text
    • https://9e705916-5bde-4eb8-be9b-8b3e910fbaf8.filesusr.com/ugd/c7a620_564fb857f3a744179d482ee070de1eeb.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/e6788f07-f3b2-41d3-8ed6-e342a95c77a7/paxirani.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/02552094-bbf0-4d61-a76d-aa62dd6c686a/guvonuzasupakukenun.pdfIn PDF document text
    • https://d0fd53c2-66a5-49f7-a942-a4bfc50892a3.filesusr.com/ugd/11baf9_522d304bd94c4b02b894784be6ed7832.pdf?index=trueIn PDF document text
    • https://5e446c31-fcb6-4427-a178-91ee45bbff8b.filesusr.com/ugd/4e76b8_6820b206a4534d1796fe62c24ea3ed25.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/538807b4-5712-4c2a-befc-ba0fdcfd6162/pusawetibunaxafufuken.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/17a1e7e1-4452-4bb8-b5af-6cc15ca9a324/how_to_run_java_web_application_in_intellij.pdfIn PDF document text
    • https://s3.amazonaws.com/sivanira/zuvinun.pdfIn PDF document text
    • https://667b589a-70dd-4c78-a03f-47f6e9f07b1f.filesusr.com/ugd/db80c5_25a66b488d254b25908e2baeed711c29.pdf?index=trueIn PDF document text
    • https://88211235-bf86-4d40-a6ec-a052db2f682e.filesusr.com/ugd/94e5ef_c244f34179b24112a1b058159931d21e.pdf?index=trueIn PDF document text
    • http://kedisijusa.onlinewebshop.net/snugride_click_connect_30_lx_infant_car_seat.pdfIn PDF document text
    • https://c7fb3737-a2fb-4e06-b71d-f78b648bb0a4.filesusr.com/ugd/a9248e_0db98455a5524ad2a0a04f44acef0ee2.pdf?index=trueIn PDF document text
    • http://gixarewujedel.atwebpages.com/the_art_of_choice_sheena_iyengar.pdfIn PDF document text
    • https://s3.amazonaws.com/fuzafuzeruwit/imaginary_numbers_worksheet_algebra_2.pdfIn PDF document text
    • https://ad858f6a-7bbb-416d-9365-e04d7986ed9b.filesusr.com/ugd/3c9ac1_18bf4efd9e7a4c3bb2a6c2d1bffbd6a0.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/e5ac0413-da01-44c7-a285-678050f52dce/xateputu.pdfIn PDF document text
    • https://19972ee8-34f0-4900-8009-9f590161cd02.filesusr.com/ugd/64db51_5a86e4dcd2774c159c9a00da8b73a702.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/dazuxujepov/coraline_sheets_wickes.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_off0000e9b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9B8 5116 bytes
SHA-256: 222f29a1c620f12f9ff8905cfccf6c1a24de7bdd910f553eae4296ff1455378c
font_01_sfnt_off0000faee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAEE 10780 bytes
SHA-256: 7068047d324a7c3f62b32ecfe2f609e00bb6297c9ad70cc22107cb5d3f052d68