Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e775bfd9eb6f67d…

MALICIOUS

PDF

98.5 KB Created: 2021-04-15 06:21:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 69906719d199cf77d0d7cb275e1b7ace SHA-1: 70762080761ed0d5e773980f00259168d1c945cb SHA-256: 7e775bfd9eb6f67dcedd0192a760619bc50ddba76341e1eac7ae746a42b88324
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 0.9988

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://seumenha.ru/strik?utm_term=etek+5+manual PDF link annotation
    • http://gatorama.site/18585121627l6ghb.pdfIn PDF document text
    • http://usacreditmonitoring.info/tuesdays_with_morrie_chapter_1_summarygmhno.pdfIn PDF document text
    • http://azorocheat1.xyz/fejamerujizulozikod6t4x4.pdfIn PDF document text
    • http://zesamoa.online/rusuwivejebojasuatv97.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/muvazi/pagigeniwarujowaxijigumuk.pdfIn PDF document text
    • https://aabf49e0-5477-4fd2-8456-a986ef8f2a87.filesusr.com/ugd/9e14ca_3926686b040e4676a948619721eb0c26.pdf?index=trueIn PDF document text
    • https://7e6b698e-d56f-4a21-8c48-787e2f6d39f4.filesusr.com/ugd/7836c9_ce3dc239194f4c18bc9e8bef7e81dcd7.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/6e6849c8-6228-460f-a8d1-751fa473c928/pobobeni.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/191ae756-8bac-4f34-a780-473ca1f7e40c/love_story_movie_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/gonafoziguwewe/vojuriwokig.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/34e5f3f5-da1e-448d-acdd-7ba4add185ee/gowirawasibipexiluvibixoj.pdfIn PDF document text
    • https://s3.amazonaws.com/zoromexemuzid/used_fisher_price_baby_swing.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c2b4a1a0-5627-4723-b5eb-4fc3f36aa4b0/24768240243.pdfIn PDF document text
    • https://75e6061f-eb7a-4ce8-b546-077bf96366c3.filesusr.com/ugd/2dfd19_1596065e2a0940adac4580f9c36b640e.pdf?index=trueIn PDF document text
    • https://d1ee23ee-9ccf-45b0-80ef-1e1ff1f657c4.filesusr.com/ugd/9ef0c3_34eac7720b254069a28c411ec5997f22.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/d98249d4-8c4f-4931-bcc7-4a072a155de3/winter_wonderland_sheet_music_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8ba1e44a-484d-4700-b73e-5010f0588c6a/portland_or_light_rail_routes.pdfIn PDF document text
    • https://011f98f8-b45f-4578-a2fd-466b530f7845.filesusr.com/ugd/74e905_3e050bb2f9404ad8b54afa1e63c12cec.pdf?index=trueIn PDF document text
    • https://9e7b01ce-91ce-414a-93c5-ade8df4b7359.filesusr.com/ugd/cfbfd2_0c6b621467e5453a8f89e3ca70b0ae96.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xefejevife/lirik_lagu_anggur_merah_trio_elexis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1cb227bf-7015-435c-b72c-128a7ad13069/bostitch_18_gauge_brad_nailer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bfbe6ee1-2d07-4d16-af53-96329525c298/65797942282.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/622d0fc9-0a9e-42df-8141-e8ce84b34210/rowalofuxixuj.pdfIn PDF document text
    • https://s3.amazonaws.com/kewakuko/lenikopugekozojovewalolox.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_off0001347d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1347D 4428 bytes
SHA-256: 9ba68756eacec5b4c1d3761414ffcfe250a133982f0e7d3bd919a288dc59ae50
font_01_sfnt_off0001436c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1436C 13304 bytes
SHA-256: c23461697a7ae6ff122df0b9e1cc1cc832bfd5cf2c9b0fe7b862d8d5f1b106f4
font_02_sfnt_off00016ea9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16EA9 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34