Malicious PDF — malware analysis report

Static analysis result for SHA-256 e9785634beddbdba…

MALICIOUS

PDF

77.5 KB Created: 2021-06-07 04:04:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d2010a789adb26a86898dae2d1d562ca SHA-1: bc900ffeb6700eddb3327d492d5a48147a4327cc SHA-256: e9785634beddbdba4af59761d1bd1b57d3d34f8403621634133ade4c465502cb
156 Risk Score

Malware Insights

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

This PDF document contains numerous external links, a common tactic for link farming or directing users to malicious sites. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, suggesting an attempt to manipulate search engine results or distribute malware. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware delivery.

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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://crewmak.ru/pbw?utm_term=introduction+to+psychology+james+kalat+11th+edition+citation
    • https://tupezufowosen.weebly.com/uploads/1/3/7/5/137500557/4e44bc3d41ad930.pdf
    • https://fixivure.weebly.com/uploads/1/3/4/8/134888316/c6677478fa2b.pdf
    • https://wawukonuxoni.weebly.com/uploads/1/3/4/0/134095992/3af0c962c1.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/282afc63-7668-4126-954f-9221ec761db2/does_simply_piano_work_reddit.pdf
    • http://neruwuk.pbworks.com/w/file/fetch/144764208/ejercicios_resueltos_ley_de_voltaje_de_kirchhoff.pdf
    • http://natizasex.pbworks.com/w/file/fetch/144578970/riseginedemodimika.pdf
    • http://kigemulu.pbworks.com/f/71425243395.pdf
    • https://uploads.strikinglycdn.com/files/b0e19dad-c9a5-4b5d-9baa-f0ca998f58aa/80138363383.pdf
    • https://uploads.strikinglycdn.com/files/36879c9f-d763-4e36-a0c9-abf8bbd0a90c/jejafe.pdf
    • http://jojekepodef.pbworks.com/w/file/fetch/144626529/nisejuvedegen.pdf
    • http://moxulolo.pbworks.com/w/file/fetch/144761223/19460799139.pdf
    • http://kepigiwup.pbworks.com/w/file/fetch/144751218/mafapulejiwebuxurofi.pdf
    • https://uploads.strikinglycdn.com/files/0dd7a313-1713-4ce0-aad1-9900dbe74171/18430757777.pdf
    • https://uploads.strikinglycdn.com/files/51dbc214-ff9f-49ef-b159-9b627abf6a31/warhammer_40k_books_in_order_reddit.pdf
    • http://dekokos.pbworks.com/w/file/fetch/144416364/pawoninokugawujog.pdf
    • https://uploads.strikinglycdn.com/files/c6c37ea4-197d-47ba-9378-af00e102c012/how_to_use_frigidaire_mini_fridge.pdf
    • https://uploads.strikinglycdn.com/files/4db9c27a-6d34-4013-896f-5107c775d2e8/nicene_creed_prayer_catholic.pdf
    • http://zabodovojif.pbworks.com/f/39714652017.pdf
    • http://furalagaposu.pbworks.com/f/detox_water_recipes_to_burn_belly_fat.pdf
    • http://sowenux.pbworks.com/f/rutipejomizutetojiguf.pdf
    • http://nolumemonip.pbworks.com/w/file/fetch/144563376/2007_yamaha_raptor_700r_special_edition_owners_manual.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_off0000ef91.bin
615b6c8b3be8a8d820fc094c5144f86f81b1d0c248ba597f8cf667f3da33c986		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEF91 5720 bytes
font_01_sfnt_off000102f4.bin
40cf966740a7e7462f23cc8c5f59cd3cf768c04928d2b43d9447afe95156f482		 pdf-font-stream PDF embedded font (sfnt) at offset 0x102F4 10372 bytes

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