Malicious PDF — malware analysis report

Static analysis result for SHA-256 cf2d01d1549256d1…

MALICIOUS

PDF

74.7 KB Created: 2021-03-09 21:47:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 417a76b90efce1812797618cd9092473 SHA-1: cff83f6c90e098ca19a9939c25410ce9f5459074 SHA-256: cf2d01d1549256d1f627fde6d1dc652f314e74250eff6ed9ad94267d28d6455b
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by multiple heuristics and an ML classifier, with ClamAV detecting it as Pdf.Phishing.Trojan. The file contains a large number of external links, indicating it functions as a link farm. The primary URL observed is 'https://resalured.ru/wix?keyword=dog+fighting+games+unblocked', suggesting a potential SEO manipulation or phishing lure. No scripts were extracted, but the PDF structure itself facilitates the redirection to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://resalured.ru/wix?keyword=dog+fighting+games+unblocked PDF link annotation
    • https://kasikijafeke.weebly.com/uploads/1/3/1/4/131406722/bufebufipefoxomipe.pdfIn PDF document text
    • https://sovajavab.weebly.com/uploads/1/3/4/0/134041947/2278003.pdfIn PDF document text
    • http://shortsomfj.space/witcher_3_stranger_in_a_strange_land_choice7dg6x.pdfIn PDF document text
    • https://pegepigav.weebly.com/uploads/1/3/4/4/134481067/6400784.pdfIn PDF document text
    • https://tumozoredupoki.weebly.com/uploads/1/3/0/9/130969837/buwosixeja-bogamej-vajimetax-jibefuberew.pdfIn PDF document text
    • http://fakaripeti.xyz/madame_bovary_2014_actorswast1.pdfIn PDF document text
    • http://differencecheats.net/povebusomabavotabeso7lpyr.pdfIn PDF document text
    • http://energytik.net/wuginukimolesagomazonokauar8.pdfIn PDF document text
    • https://vojerured.weebly.com/uploads/1/3/3/9/133999986/2152342.pdfIn PDF document text
    • http://ag-management.space/13601619420te2pk.pdfIn PDF document text
    • https://ladevizeloraben.weebly.com/uploads/1/3/1/6/131606454/jurixi-josefasoganof.pdfIn PDF document text
    • http://ropikapusofune.iblogger.org/wezegajoxadepa.pdfIn PDF document text
    • http://ndfnasg.xyz/256735067408cgxw.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/d6e8489a-17a8-4199-8c94-783d9050e84b/10797312070.pdfIn PDF document text
    • http://remofexemuja.rf.gd/37730907838.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f7575b4b-8219-41dd-a956-f5cce7d163cd/35641066271.pdfIn PDF document text
    • http://gopogawamo.rf.gd/tivuw.pdfIn PDF document text
    • http://xifawuzegeliwag.rf.gd/58139996779.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ab330434-c3c3-4a29-a610-95736a4da958/16534759995.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d991.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD991 5424 bytes
SHA-256: 58e8fa174cadae7ef8e10334b119acf91b6909fbba9a4e5f40d0148f3ae4e28b
font_01_sfnt_off0000ebd6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBD6 10364 bytes
SHA-256: b24f11e84d92e2445283b042ce8801c4de61d8656f38457ed9ae10e3872520ae
font_02_sfnt_off00010f46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F46 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230

Open this report in the interactive analyzer, or submit your own file for analysis.