Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a69c06c79945e68…

MALICIOUS

PDF

82.0 KB Created: 2021-03-22 17:20:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 6eec263486b11f6548a4fcf3ebad59f3 SHA-1: 54986c71b96a0fd53ebf93110884a5cecc0942c8 SHA-256: 9a69c06c79945e6866c46a1afc091f24b457577d5d11cc9b0d5f5f6996a1d1de
186 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 0.9996

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/strik?utm_term=rehras+sahib+mp3+download+lyrics PDF link annotation
    • http://lipuwisapi.mywebcommunity.org/non_disclosure_agreement_sample_uk.pdfIn PDF document text
    • http://tibudirowe.mygamesonline.org/sbac_practice_test_5th_grade_math.pdfIn PDF document text
    • http://talajudoxuxip.mygamesonline.org/deepak_chopra_ageless_body_timeless_mind_free_download.pdfIn PDF document text
    • http://zopokujejisolan.getenjoyment.net/saga_oscuros_lauren_kate.pdfIn PDF document text
    • https://bapefakujina.weebly.com/uploads/1/3/4/4/134483882/2e0e075cf.pdfIn PDF document text
    • http://miromawetibikew.mywebcommunity.org/5093833013.pdfIn PDF document text
    • https://towowiwegopute.weebly.com/uploads/1/3/4/0/134019464/riduzavepugunerotado.pdfIn PDF document text
    • http://farozemirig.scienceontheweb.net/gavizosenumifubofuwedimi.pdfIn PDF document text
    • https://tofaxewa.weebly.com/uploads/1/3/4/6/134672655/6f2196f3fa993.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://6f84c080-6bd2-4154-8ce1-0e390380bda5.filesusr.com/ugd/defdb4_816d1098b8364d08b0db837884c668b5.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/waxegatulo/fabedebux.pdfIn PDF document text
    • https://f13dd0f9-fe0a-4257-a88d-d9af1a1cf0e3.filesusr.com/ugd/d954c5_aee8bc4c32b24f9b9d932e1928689ce1.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/64013840-8d1d-4556-a953-e6a364b56d40/18626857615.pdfIn PDF document text
    • https://4f65501f-cdae-4966-b9db-49b15ad9d196.filesusr.com/ugd/52b593_fd151ea7bc3648ec8d7f5c4b5984fddd.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/dudurat/labyrinths_jorge_luis_borges_summary.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9f32f871-2537-4f29-88be-b8a5efc35065/definicion_de_primeros_auxilios_oms.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1aea91b7-5154-479d-ab27-0f35770bd8e0/44449655381.pdfIn PDF document text
    • https://436010f1-0dd7-4950-aec0-3bdf337573e8.filesusr.com/ugd/5a4c69_7527440368094973946834eb569a53d4.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/3549b59e-2489-4de6-8dd7-9aaf6c4d807d/the_practice_of_statistics_6th_edition_teachers_edition.pdfIn PDF document text
    • https://s3.amazonaws.com/rojalexipokadaz/wallpaper_photo_hd_2018_3d.pdfIn PDF document text
    • https://788ae96d-7a4f-4726-91a9-07bb742fb3e7.filesusr.com/ugd/97aff7_470f4d90b8c9410da5945389fea09d44.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/fa8f1364-3cec-4d6e-aad7-37132d60b391/pusevazevonegesiwilosozo.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_off0001049f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1049F 5816 bytes
SHA-256: c49a2f9406eceeaffa3559339f941354699dbded0b686558d393102880447e02
font_01_sfnt_off00011857.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11857 10088 bytes
SHA-256: c42827c592b9bb179073b71d4adc595b0c44e467afcbf160be553abb7f2768de