Malicious PDF — malware analysis report

Static analysis result for SHA-256 5dfb5cefffd40e67…

MALICIOUS

PDF

75.4 KB Created: 2021-05-04 05:59:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 875c5a137eef5124f7eaa92a77eb69ea SHA-1: db9faa48b1ed0cf383476c0b03aa012d5cee4a50 SHA-256: 5dfb5cefffd40e674a5328f2b5e98d189ea3014837a606c0ee8530779bd6b2bf
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, as indicated by the 'PDF_SEO_LINK_FARM' heuristic. The primary URL, 'https://pelibifir.ru/strik?utm_term=the+way+of+the+world+book+review', suggests a phishing or malicious redirection attempt. The ClamAV detection and ML classifier further support the malicious nature of the file, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://pelibifir.ru/strik?utm_term=the+way+of+the+world+book+review
    • http://mifelosilezine.iblogger.org/maplestory_macbook_pro.pdf
    • https://jurulekoteg.weebly.com/uploads/1/3/4/7/134700509/jakub.pdf
    • https://rarozevalir.weebly.com/uploads/1/3/1/4/131437937/7828153.pdf
    • http://muvipokikuwopek.22web.org/62989894762.pdf
    • https://kutenamig.weebly.com/uploads/1/3/0/7/130740069/pizezo.pdf
    • http://bukejasinopa.22web.org/59330174825.pdf
    • https://cdn-cms.f-static.net/uploads/4420430/normal_6056b746979ef.pdf
    • https://romugazasemagop.weebly.com/uploads/1/3/4/8/134897733/9280385.pdf
    • https://xesinuvukuwufo.weebly.com/uploads/1/3/0/7/130776104/16c70c3e232ae0.pdf
    • http://suzaxikuzexaw.66ghz.com/adaptive_app_icons_android.pdf
    • https://cdn-cms.f-static.net/uploads/4415304/normal_606dcabbe7e19.pdf
    • https://cdn-cms.f-static.net/uploads/4393762/normal_602c05f932ece.pdf
    • https://cdn-cms.f-static.net/uploads/4485807/normal_60657fa955327.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/wuwabobujasivor/sezosimo.pdf
    • https://s3.amazonaws.com/dofufiri/zarchiver_apk_new_version.pdf
    • https://da18e6a8-d720-42de-a88c-3f13daad7efb.filesusr.com/ugd/08fe48_fc77e2d2f96144ba86d287c99d73c66a.pdf?index=true
    • http://pokowowusi.rf.gd/xepitafetivalozaxa.pdf
    • https://s3.amazonaws.com/wakuzidi/lerigoxadiluwafoli.pdf
    • http://bojonovaja.rf.gd/tertiary_wastewater_treatment_methods.pdf
    • https://4b98dde3-f65d-4e11-807b-d4501949e87b.filesusr.com/ugd/4a7ebd_c41463e8532e4a7a80ee7a71c29d9307.pdf?index=true
    • http://xagazusapikim.epizy.com/gexamuwefalupa.pdf
    • https://s3.amazonaws.com/neviwove/83502182161.pdf
    • https://98748e4b-3258-471a-903e-8ea98415cca0.filesusr.com/ugd/fd7405_4c152bace59c43b291469dbcff0b27fb.pdf?index=true
    • https://167c2301-eccc-4e3a-a609-38a4f17b9bf8.filesusr.com/ugd/b1dabf_335d1ba0a74d45889934d818dfefdb6c.pdf?index=true
    • http://livexixabev.epizy.com/5739307595.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e961.bin
83c2ddf3a4154a1cfdc78b4c144680a4b602760cf99c7c2f69fa13c3fc718124		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE961 5224 bytes
font_01_sfnt_off0000fb3e.bin
b7698d750934e6e66479075ecaad68edea81758480ba1954271bf0510094860e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFB3E 10804 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.