Malicious PDF — malware analysis report

Static analysis result for SHA-256 8210bbb4d54c6c42…

MALICIOUS

PDF

77.1 KB Created: 2021-03-14 03:57:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: e71e26f5adc157675c0ee26c421f7c19 SHA-1: 84ea5fe771cf53a2d24b2b62ed36c4299ac1bee2 SHA-256: 8210bbb4d54c6c4280a9f1b67a793c368df392a89110a7926f151eca80dcb971
126 Risk Score

Malware Insights

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

The PDF contains numerous external URIs, many pointing to disposable domains, and is flagged by ML classifiers and ClamAV as malicious. The document body, though heavily obfuscated, appears to be a lure related to search terms, directing users to a URL that likely hosts a malicious payload. The presence of embedded JavaScript, though not directly analyzed here, is a common method for executing malicious actions within PDFs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://xezojetit.ru/strik?utm_term=matlab+plot+grid+on+top PDF link annotation
    • http://aslixan.com/braums_menu_nutrition_informationrapqs.pdfIn PDF document text
    • http://cocobuka3.xyz/59657238805d8sfw.pdfIn PDF document text
    • http://veselutut.mywebcommunity.org/mexarimojawoluzotikav.pdfIn PDF document text
    • http://copyrightprivacy.site/buzepopapexivakefiktyza.pdfIn PDF document text
    • http://wejuveziwep.mypressonline.com/online_bengali_books_free_download.pdfIn PDF document text
    • http://bapatavusirave.mygamesonline.org/how_to_maintain_weight_with_type_1_diabetes.pdfIn PDF document text
    • http://zixivudu.getenjoyment.net/19738784576.pdfIn PDF document text
    • http://goodik.fun/65673430863ddkj0.pdfIn PDF document text
    • http://kalukawuwo.mygamesonline.org/vagurejilowekazu.pdfIn PDF document text
    • http://puvepum.getenjoyment.net/el_hijo_horacio_quiroga_analysis.pdfIn PDF document text
    • http://nikibolerobika.getenjoyment.net/molofobafepabesukifig.pdfIn PDF document text
    • http://sarhello.online/48967670010fcxnw.pdfIn PDF document text
    • http://gladkoe-telo.xyz/xujivatijalosuleafzot.pdfIn PDF document text
    • http://shopeuro.pro/omron_blood_pressure_monitor_hem-711dlx_manualpqiwg.pdfIn PDF document text
    • http://ganedoxumizaj.sportsontheweb.net/67712860360.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/wexukufedepim/noleroladim.pdfIn PDF document text
    • https://160e4e15-e27a-4ef2-9b26-f67fc0969a86.filesusr.com/ugd/cbdbb6_2693f24416cf4a16b776585514c24fa3.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/muvevanepen/it_would_be_a_great_favor_meaning_in_urdu.pdfIn PDF document text
    • http://gixejemazob.myartsonline.com/turezevifenikuxusaxemub.pdfIn PDF document text
    • https://70010cfe-69b1-4fe9-a336-bdfe2418dc1e.filesusr.com/ugd/f1d680_0249ea00117d4e95b7351a41452cce98.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zonivezada/finding_perimeter_of_complex_figures_worksheets.pdfIn PDF document text
    • https://ccd4a2e6-63e2-4dcb-a02e-1ae1253dabcc.filesusr.com/ugd/059ff1_6681566c0f894fc2a9739889e3407c4b.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xafaxotaful/80272867784.pdfIn PDF document text
    • https://2d841ef3-a248-4e6a-996b-2d54d6713fdd.filesusr.com/ugd/1decf9_e28f158731734f09b6c1fca8a883628c.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/paropabaru/gevekebipupekelika.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ec5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC5C 5092 bytes
SHA-256: bf38be5cae4d937d3bcf9fad9dec6e188a0de5bc52e4921b2d2fe11edeb5748d
font_01_sfnt_off0000fdbe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDBE 11576 bytes
SHA-256: 4898f98a6b774901ce739be32f80b93f88e2999245c48a1ff5ed0a8d13abd10f

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