Malicious PDF — malware analysis report

Static analysis result for SHA-256 fbb88238e59b318a…

MALICIOUS

PDF

83.1 KB Created: 2021-03-27 19:52:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9edbbe8368f0d5f20e9edd2b1e390a87 SHA-1: 74eaa064ad3d8e95b3bf86973a3f25c38397e85a SHA-256: fbb88238e59b318a5cbe717e9ca92a2affe7ef1627d040a01f1b6f9482bba39d
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many of which are part of a link farm designed to appear as legitimate documents. The presence of a link related to a popular movie suggests a lure to attract user clicks. While no scripts were explicitly extracted, the PDF structure and the high number of external links indicate a potential for phishing or malware distribution, as flagged by ClamAV and ML classifiers.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://jumiwimov.ru/wix?keyword=watch+tiger+zinda+hai+movie
    • http://erkutungotu.com/sears_18_42cc_chainsaw_manual8af5g.pdf
    • https://fukorolavo.weebly.com/uploads/1/3/4/6/134639224/4548846.pdf
    • http://bukuminuwakub.mypressonline.com/27155564301.pdf
    • http://lnstagramverifiedsbadgesforms.com/homelite_super_xl_automatic_partsij282.pdf
    • http://all-system7.work/gaming_austria_guidepiub3.pdf
    • https://nofuxufemi.weebly.com/uploads/1/3/2/6/132681390/kakoturajiloku_titilogegezufef_tokeli_tixirexidev.pdf
    • https://wazivako.weebly.com/uploads/1/3/0/9/130969042/mafiwew.pdf
    • https://sepetumeba.weebly.com/uploads/1/3/4/6/134601334/5048c9ee43.pdf
    • https://sobuxiba.weebly.com/uploads/1/3/4/8/134867950/vanetedezib-bumute-nulivapirudado-kamud.pdf
    • http://antileqphh.site/visobiwigilepoifb.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/287977f7-0d58-4f30-b83c-2e93ecd4d48d/81474115829.pdf
    • https://s3.amazonaws.com/dekogamik/lugipunabixilepulad.pdf
    • https://s3.amazonaws.com/limewub/connecticut_river_paddlers_trail_map_and_guide.pdf
    • https://uploads.strikinglycdn.com/files/09d9e4ec-ea18-4149-bc16-5b12ab16db4d/rivufiwowa.pdf
    • https://4bd9ed84-c80b-4837-bb2f-b1353ebfd8aa.filesusr.com/ugd/5a1791_820195170b24427596f66c2b7255feb8.pdf?index=true
    • https://7a3463bf-3117-47cc-940f-ad9d50d05675.filesusr.com/ugd/9f2514_5e8bd696756f41c7ac4252346bb89d74.pdf?index=true
    • https://s3.amazonaws.com/dowadotiju/dutopalunujarev.pdf
    • https://s3.amazonaws.com/fajeloninesitel/how_do_we_know_how_to_read_hieroglyphics.pdf
    • http://nazowovemozugiv.myartsonline.com/bdm_test.pdf
    • https://uploads.strikinglycdn.com/files/1aa77d8a-b5ee-497d-b19b-9b1499b718d7/44783114885.pdf
    • https://s3.amazonaws.com/jupevuxirapi/vutonunosudigekowubolex.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_off00010735.bin
95d78a4bf88722bcb8789552d5f01b678b39aa820291474b6407a77490d3cd2b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10735 5264 bytes
font_01_sfnt_off0001190a.bin
561e3add9d47cd1403c9bdcd9a04b5cb366dea06a03a66f376823bb533622f04		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1190A 11316 bytes

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