Malicious PDF — malware analysis report

Static analysis result for SHA-256 1bd3878dc197ae16…

MALICIOUS

PDF

88.5 KB Created: 2021-04-11 06:44:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 011fc469eff5f7ab1ad3a20632240016 SHA-1: 4494a430b8e4ab05fc94474aa0b0751271cc485e SHA-256: 1bd3878dc197ae167fe9d2e73879296ee3f3a942269406cba0da15d07769af0a
156 Risk Score

Malware Insights

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

This PDF file contains a large number of external links, many of which point to PDF files hosted on various platforms, suggesting a link farm designed to manipulate search engine rankings. The primary URL, 'https://jumiwimov.ru/strik?utm_term=the+mortal+instruments+book+series+age+rating', is presented as a search result, indicating a phishing or SEO manipulation tactic. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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/strik?utm_term=the+mortal+instruments+book+series+age+rating
    • https://dunogijejuj.weebly.com/uploads/1/3/0/8/130813547/72333ab3a4592c.pdf
    • https://cdn.sqhk.co/konumapedowe/5jhCJD1/87799531716.pdf
    • https://janogawe.weebly.com/uploads/1/3/0/7/130776821/7797693.pdf
    • http://tafugegajotu.mygamesonline.org/jolugorowuduvixuvapimemal.pdf
    • https://cdn.sqhk.co/gimowiboxero/juigThh/56789323974.pdf
    • https://cdn.sqhk.co/ruwonumatag/djavHBT/delalemolorezuva.pdf
    • https://cdn.sqhk.co/piredonina/jjagcBZ/camera_and_microphone_for_computer_monitor.pdf
    • https://cdn.sqhk.co/rufopunuk/Fhb6pgz/wrebbit_3d_harry_potter_hogwarts_express_puzzle_instructions.pdf
    • https://cdn.sqhk.co/rorajakura/idHjcFa/dj_sound_effects_app_ios.pdf
    • https://cdn.sqhk.co/malofavu/imjiidl/tuzabuxadowifoveji.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://5a6df620-610b-4d6f-8f1b-71e936bb70bc.filesusr.com/ugd/1f5cef_8a289854ff97488eac629e43b6310102.pdf?index=true
    • https://s3.amazonaws.com/vobuturinivi/fikazapemigupifu.pdf
    • http://kipejefanowisu.atwebpages.com/pasogemedoribodegokobese.pdf
    • https://305aa2e3-e1d2-413d-aa2e-f1bb83d03ded.filesusr.com/ugd/92ee2b_a4040c8b3a1c4f119f7abc3fd99818cd.pdf?index=true
    • http://xezaretidatoro.onlinewebshop.net/mapapipuver.pdf
    • https://s3.amazonaws.com/lupuvogotog/44147101547.pdf
    • https://e1eccfe9-8888-4f52-a155-e9c8e84e0752.filesusr.com/ugd/4fb05f_93c0a655c4b34f42a8c5cb0626ca6f14.pdf?index=true
    • http://saluwagasa.onlinewebshop.net/sedoretisakepokoko.pdf
    • https://765a5d72-5774-4a4d-a421-5c90307110ba.filesusr.com/ugd/f2a868_555bef8f8108460db8dd921dc70cff81.pdf?index=true
    • https://s3.amazonaws.com/purufiz/transformers_g1_bumblebee_voice_actor.pdf
    • https://8ab1a2d5-e5b1-44c5-a28c-e09959565f0d.filesusr.com/ugd/eb712c_1df6e05315854fcba89bebc8d54967b5.pdf?index=true
    • http://rujidafedisezu.atwebpages.com/types_of_altars_in_the_bible.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_off00011d66.bin
4c4431f93953de0f5e8a829177c521dab3d362bd3b14d0b82cccecd5bb1612ac		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11D66 5252 bytes
font_01_sfnt_off00012f12.bin
2809af5a55c28cf115a8e35229c4a916b4f3db105315cf6dae86524eb322a3c7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12F12 11108 bytes

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