Malicious PDF — malware analysis report

Static analysis result for SHA-256 74c21c6798a77b43…

MALICIOUS

PDF

93.7 KB Created: 2021-06-13 00:08:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 3f5733e92489e2065a4f9593beaa66b9 SHA-1: af5094170c33734280591ced32101830ccdce152 SHA-256: 74c21c6798a77b439b2b258eeb4297e4bfd5a9b2058119ec8e12d3643aa96c9a
126 Risk Score

Malware Insights

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

The PDF file contains numerous links, many pointing to disposable hosting, and is flagged by ML classifiers and ClamAV as malicious. The embedded content suggests a lure for movie downloads, directing users to a suspicious URL. While no scripts were explicitly extracted, the PDF structure and heuristic firings indicate malicious intent, likely to redirect users to phishing or malware distribution sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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 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://bologen.ru/123?utm_term=shoorveer+south+movie++720p PDF link annotation
    • https://zazewefagawi.weebly.com/uploads/1/3/0/7/130776698/tefulevezekavineseta.pdfIn PDF document text
    • https://nijolajosota.weebly.com/uploads/1/3/4/6/134678148/nogebamufibamu_wizajegexagi_korifebadozudub.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4379038/normal_60b6b03056ea8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403539/normal_60431bdedd7b3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367959/normal_60251b371b0d7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471703/normal_60250a2aabc1f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484834/normal_5fd14900310a3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459176/normal_6026238c3f459.pdfIn PDF document text
    • https://nelubetif.weebly.com/uploads/1/3/5/3/135322580/bubufijofajame_sudimomomozitut.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://uploads.strikinglycdn.com/files/fb47848f-73b5-457f-84be-b7242e5c1729/69806814017.pdfIn PDF document text
    • http://xiwitanul.pbworks.com/w/file/fetch/144463737/64023213594.pdfIn PDF document text
    • http://pokuwatosat.pbworks.com/w/file/fetch/144556509/descriptive_words_for_music_sounds.pdfIn PDF document text
    • http://pevozowo.pbworks.com/f/87161714367.pdfIn PDF document text
    • http://dimutojopog.pbworks.com/w/file/fetch/144443154/how_to_put_traxxas_esc_in_training_mode.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f0eed098-d542-4769-a324-4fb1f800768d/fejeburominofuzebad.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/54e19078-09d5-4304-9101-ea2459486df5/23041299394.pdfIn PDF document text
    • http://dejulagimu.pbworks.com/f/3811772054.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6e6b65d1-0ae5-437b-aa66-728aa1617717/farberware_5_cup_coffee_maker_parts.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn 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 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e74a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE74A 6440 bytes
SHA-256: edf517a561ed5132c6c1d5718ac6ff9d870a00e6f43a91762fd168a2279cca75
font_01_sfnt_off0000f740.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF740 5332 bytes
SHA-256: 5f798cce0f58da030432cd5de435ae3881ad3184b8bd62273133fa672d5853b6
font_02_sfnt_off0001093e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1093E 3756 bytes
SHA-256: 065cc2c9f2901b3e7b813fd4c8575427a81d8f41691894dfe33b4a1d40c0e951
font_03_sfnt_off000117c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117C1 10924 bytes
SHA-256: 2dc2958c463e4ae86a0133b681e15cf39840f30d5c26a57e63ed431f4a41ffc0
font_04_sfnt_off00013d87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13D87 16036 bytes
SHA-256: 149cab45689013e99d1aa520d2e5234663aa5d8577b6aae5e423b5d60aeda4c1
font_05_sfnt_off0001522b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1522B 5848 bytes
SHA-256: a277c8ad0526135a27b61cfc188cc64189653da75ca742596e4d7a0ba91a07e8

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