Malicious PDF — malware analysis report

Static analysis result for SHA-256 007a99299bded0b4…

MALICIOUS

PDF

81.4 KB Created: 2021-03-29 06:12:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 4a2cb6d46e37d8137fdcd7fd2278bb95 SHA-1: 052e676796c24dca20bccd4b30d709fb51e2e2fc SHA-256: 007a99299bded0b49de7956db73edf00e47666e554ea41fd7d15a45ef116642c
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, a common tactic for phishing or SEO spam. The heuristic 'PDF_SEO_LINK_FARM' and the presence of multiple external URLs strongly suggest malicious intent. The ML classifier and ClamAV detection further confirm this, flagging the file as malicious. The embedded content, though heavily obfuscated, likely serves to disguise the malicious links and lure the user.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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 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.
  • 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/123?utm_term=bedwars++minecraft+pe PDF link annotation
    • https://dakopubelodeb.weebly.com/uploads/1/3/0/7/130775015/rodizevikev.pdfIn PDF document text
    • https://cdn.sqhk.co/tarekekog/aPheQKw/gitevadegiwulunut.pdfIn PDF document text
    • https://wobufijurix.weebly.com/uploads/1/3/1/6/131607063/869bfc0fdf0fb0a.pdfIn PDF document text
    • https://cdn.sqhk.co/tatiderubota/ijnjf6G/bmobile_sim_card_number.pdfIn PDF document text
    • https://cdn.sqhk.co/luxixumogez/TUatIgc/29485711226.pdfIn PDF document text
    • http://pebifakonek.sportsontheweb.net/kuwubirozelifom.pdfIn PDF document text
    • https://cdn.sqhk.co/kugefaxeker/7SU8gcl/dhoom_3_trailer_reaction.pdfIn PDF document text
    • https://fekipasipoxow.weebly.com/uploads/1/3/1/6/131637207/dab7254bd.pdfIn PDF document text
    • https://gefizubumob.weebly.com/uploads/1/3/4/4/134473977/d3a6df898eac.pdfIn PDF document text
    • http://rulabepotinujeb.mypressonline.com/40918642655.pdfIn PDF document text
    • https://fubuwadedaxas.weebly.com/uploads/1/3/4/8/134897716/95c7e6.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://03f57db0-fbcf-46ec-8713-21b5992b8512.filesusr.com/ugd/455f95_5ceff098db1944e9825f80f2db8070ca.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/desekusoxi/comptia_cysa_cs0-_001_certification_study_guide.pdfIn PDF document text
    • https://fb1cd387-549b-40f1-a5a4-67fd65d29bb3.filesusr.com/ugd/4200b4_b7a84bdebdb34cd5a6b6168f7a05c825.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/vabedafozo/inter-tel_phone_manual_8622.pdfIn PDF document text
    • https://s3.amazonaws.com/gazijewevan/0_1_2_conditional_worksheets.pdfIn PDF document text
    • http://lugenizuridaj.atwebpages.com/negujijimawamipifedokixem.pdfIn PDF document text
    • https://s3.amazonaws.com/pewebopufupe/rascal_mobility_scooters_for_sale_used.pdfIn PDF document text
    • https://s3.amazonaws.com/zategafozasiru/26238356760.pdfIn PDF document text
    • https://d3df31c7-72fe-42b1-a92e-0723e8ed7a16.filesusr.com/ugd/5bf82b_cad9de16548e411b9c7633f3bc349fd2.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/besafefaf/resumen_del_libro_el_dador_de_recuerdos.pdfIn PDF document text
    • http://zenakezogutomu.onlinewebshop.net/68115955494.pdfIn PDF document text
    • https://s3.amazonaws.com/xuzed/rules_by_cynthia_lord_test.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e618.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE618 5408 bytes
SHA-256: 86f24a95dbede225cbab9ccef42d63602f90983c10f24f600a4acdb95535a080
font_01_sfnt_off0000f881.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF881 11932 bytes
SHA-256: 47439edc5ebf20f975feba29ab15a7b9e8d8a0de85ee4a72ea8a246f305c2fc3
font_02_sfnt_off0001215f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1215F 16192 bytes
SHA-256: 75ae46b37e824a31f3d2919be60c52daf1ed383ea62173cd6befebe04d4d68f2

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