Malicious PDF — malware analysis report

Static analysis result for SHA-256 cb3bafd267e35ab1…

MALICIOUS

PDF

82.7 KB Created: 2021-03-22 19:46:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 187d6ed45b1006c45a1314523de6c9f5 SHA-1: bd0ae0ec1e7bd86d82c89a81b36a08678b286e33 SHA-256: cb3bafd267e35ab1236741282bec116c48eeafdc950698c38dd8529655c9453b
186 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many hosted on disposable domains, suggesting a link farm or phishing lure. The document body text, though heavily obfuscated, references "mortal kombat x hack ios free download", indicating a deceptive lure. The presence of PDF_SEO_LINK_FARM and PDF_SEO_DISPOSABLE_LINK_FARM heuristics, along with ClamAV detection as Pdf.Phishing.Trojan, strongly suggests a malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://midufefew.ru/wix?keyword=mortal+kombat+x+hack+ios+free+download PDF link annotation
    • https://gizigega.weebly.com/uploads/1/3/3/9/133999267/bolidixopowedapajuwu.pdfIn PDF document text
    • https://ramimuluvisefo.weebly.com/uploads/1/3/0/7/130775145/gigomilusu_nuzilox.pdfIn PDF document text
    • https://rokumetusemep.weebly.com/uploads/1/3/4/3/134382705/vuxoteleba.pdfIn PDF document text
    • https://pamiwawoxok.weebly.com/uploads/1/3/6/0/136089952/xurevinagufuba.pdfIn PDF document text
    • http://kemikavar.mypressonline.com/forever_bethel_chords.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464865/normal_605028ae19e16.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452609/normal_605190218eca4.pdfIn PDF document text
    • http://rugegav.mywebcommunity.org/13365541604.pdfIn PDF document text
    • https://rawakewafefefew.weebly.com/uploads/1/3/1/1/131163904/7258474.pdfIn PDF document text
    • https://vipofobusaxipol.weebly.com/uploads/1/3/4/2/134234766/3066339.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418197/normal_6055b02a6e095.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4378383/normal_600317ff02066.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412593/normal_6010ef651440b.pdfIn PDF document text
    • http://vumexovuvelafe.medianewsonline.com/81886127930.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4422643/normal_5fee8696456b6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446275/normal_602285ee68fb1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4452837/normal_5fef9355af2c7.pdfIn PDF document text
    • https://peroleliviw.weebly.com/uploads/1/3/4/6/134648746/c37acf26b4f6.pdfIn PDF document text
    • https://lepovomika.weebly.com/uploads/1/3/4/7/134701686/lamotex_puwenori_jagad.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/ae730414-7b62-4ff6-8aa1-c2d82866480f/summer_baby_monitor_video_keeps_turning_off.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/92c845de-a45e-491f-af4b-887c3180444f/72351889803.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/14d70cc8-e6e1-412f-aee7-e4912919c537/winikejalipijojaxuliw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a5f08127-349f-4937-9841-9589d8d968ff/99590979820.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/be1265e2-7b4e-4d5e-8414-694174bded73/dell_e207wfp_manual.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_off0000f695.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF695 5416 bytes
SHA-256: 2cde93cbdcdb51ae226b6b06a53ead9cacfd0f5e75717eee91dd810615f4510a
font_01_sfnt_off000108f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108F0 11140 bytes
SHA-256: 1fe4e033ee671059306a1696d99d89fed97fa2d45284f5c2274352fa9f2ba2c2
font_02_sfnt_off00012f1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F1E 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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