Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f2c85549406e65a…

MALICIOUS

PDF

99.3 KB Created: 2021-03-16 17:38:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3a28257e3b9b1d58089eff14dedaeb3b SHA-1: 28b5b96d44aecd31d193183fda699330f92820cb SHA-256: 7f2c85549406e65a9732e506b4a651fd1af17f1d2ff444ec8733bda0896f9a08
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains numerous external links, suggesting it is part of a link farm or SEO manipulation scheme. One of the primary external URIs, 'https://resalured.ru/wix?keyword=stany+zjednoczone+mapa', appears to be a lure, and the PDF itself links to 30 other PDFs, many hosted on disposable domains or CDNs, which is characteristic of phishing or malware distribution. No scripts were extracted, but the PDF structure and extensive external linking strongly suggest a phishing or content-luring attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9986

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://resalured.ru/wix?keyword=stany+zjednoczone+mapa
    • https://cdn.sqhk.co/baziwuwe/V0ge4uF/zewib.pdf
    • https://cdn.sqhk.co/xefijumu/iTP5hhA/league_of_legends_wild_rift_beta_apk_obb.pdf
    • https://raligeledow.weebly.com/uploads/1/3/4/8/134893256/ed428fae.pdf
    • https://lekinimogasujif.weebly.com/uploads/1/3/0/7/130739945/pilubabizetaj.pdf
    • https://fikomepa.weebly.com/uploads/1/3/5/2/135299400/mazisulosikizusulemu.pdf
    • https://devitigofe.weebly.com/uploads/1/3/1/0/131070043/dagivupuzoji.pdf
    • https://cdn.sqhk.co/wenegifuteg/ggK09gj/cost_of_online_piano_lessons_uk.pdf
    • https://vizavidonase.weebly.com/uploads/1/3/4/0/134040461/8892137.pdf
    • http://jiviruke.iblogger.org/dabogudumuxul.pdf
    • https://jasesinokez.weebly.com/uploads/1/3/1/1/131164090/8f8de809d.pdf
    • https://vimuzepujox.weebly.com/uploads/1/3/4/3/134368191/1ce6e53.pdf
    • https://cdn.sqhk.co/fuwifemi/l2zifIC/survivalcraft_2_multiplayer_mod.pdf
    • http://pasendapp.online/radivedupidetuxozagowibanshlg.pdf
    • https://zexajupa.weebly.com/uploads/1/3/4/6/134692079/binur-nulukuve.pdf
    • https://dejewetekexofig.weebly.com/uploads/1/3/0/7/130775583/50c4288d3c6e.pdf
    • http://mgacessoria.online/283068965581ay9a.pdf
    • http://baby-slings.ru/barron_s_sat_subject_test_math_level_2_download_freexbcvg.pdf
    • http://1xbet-registrat.site/how_to_find_radius_of_cylinder_with_height4zfvc.pdf
    • http://instapodarok.site/cateye_velo_5_review90hqj.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://zenejifawulo.epizy.com/roomba_560_parts.pdf
    • https://uploads.strikinglycdn.com/files/3b7b44f1-b492-4ccd-9ef6-b921989f369e/jabufuvas.pdf
    • https://uploads.strikinglycdn.com/files/7cbce53a-5a70-4060-a910-77c2b3446375/dikalibenul.pdf
    • https://uploads.strikinglycdn.com/files/8c2fb774-d457-468b-95a6-9e49ade01415/23652020439.pdf
    • https://uploads.strikinglycdn.com/files/0d7e4d30-23a5-4334-b99d-b598cf52a857/creative_writing_prompts_middle_school.pdf
    • https://uploads.strikinglycdn.com/files/92e54764-a3fc-407a-9f81-7588affb06d9/can_you_get_new_battery_for_kindle.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000136ea.bin
286e74296a78a076ebfadf30f8089decdb36cdd70c97b7b0cb0a0a61beafaaa3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x136EA 4984 bytes
font_01_sfnt_off000147d4.bin
2614cba3897f550bdd487ca6690e11eed99e82568e1b0dbd3008cc60ddc716ff		 pdf-font-stream PDF embedded font (sfnt) at offset 0x147D4 12628 bytes
font_02_sfnt_off00016fd8.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34		 pdf-font-stream PDF embedded font (sfnt) at offset 0x16FD8 4324 bytes

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