Malicious PDF — malware analysis report

Static analysis result for SHA-256 e9a497befad506c3…

MALICIOUS

PDF

80.2 KB Created: 2021-03-10 23:55:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 337f066cccebf205e0f287ba1195d09d SHA-1: 83d537685b3284cca3125462ad1da433aa8234b0 SHA-256: e9a497befad506c33f5b710ce9d28d57031c80022f019c85570e2fedca1f0b18
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The file is identified as malicious by ClamAV and an ML classifier, with heuristics indicating it functions as a link farm on disposable hosting. The embedded URLs, such as 'https://resalured.ru/123?utm_term=green+lantern+corps+recharge', and the PDF structure suggest an attempt to direct users to potentially harmful external sites. While no scripts were explicitly extracted, the PDF's nature and the presence of numerous unknown URLs point towards a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 5

  • 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 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/123?utm_term=green+lantern+corps+recharge PDF link annotation
    • http://ilkertr.shop/19489307816qqqfq.pdfIn PDF document text
    • https://sewetinupas.weebly.com/uploads/1/3/3/9/133997680/7579349.pdfIn PDF document text
    • http://rexonina.medianewsonline.com/buvegulepatedalizebogizez.pdfIn PDF document text
    • http://nncucuucuc.space/54656735898ppwwi.pdfIn PDF document text
    • http://wozupabalaviv.medianewsonline.com/tuveku.pdfIn PDF document text
    • http://kokolonesafu.getenjoyment.net/ascii_table_hex_a0.pdfIn PDF document text
    • http://xofebuledat.scienceontheweb.net/givoroxalovurafaj.pdfIn PDF document text
    • https://xusolufazajone.weebly.com/uploads/1/3/1/3/131383045/fedinowoxozep-lolorowinigeg-getujimone.pdfIn PDF document text
    • https://daxigowopijadek.weebly.com/uploads/1/3/0/8/130814785/1401875.pdfIn PDF document text
    • http://italiahot.fun/forged_in_fire_in_hindi_translation1eezv.pdfIn PDF document text
    • http://pshcomonhere.xyz/nelajusewadanafana1k1k.pdfIn PDF document text
    • http://katipef.medianewsonline.com/divx_converter_serial_number_crack.pdfIn PDF document text
    • http://vitrinachel.ru/famud8kc4x.pdfIn PDF document text
    • http://testersairf.xyz/natezoduxilcrwo.pdfIn PDF document text
    • http://copytoshka.ru/demonawewidijumezazifuj80jeg.pdfIn PDF document text
    • http://com-connexion.xyz/yaseen_alkalamc619b.pdfIn PDF document text
    • https://xikisujegowo.weebly.com/uploads/1/3/1/8/131856166/lupisikolixer.pdfIn PDF document text
    • http://kenugizi.getenjoyment.net/wodemafin.pdfIn PDF document text
    • http://powerpoint4you.ru/lomodebozixatofowepea0mfq.pdfIn PDF document text
    • http://witaxolexigabi.mywebcommunity.org/83082647592.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/cd08ed27-bcd7-427b-801f-00e6cfe5ed57/algebra_1_download.pdfIn PDF document text
    • http://tisavan.onlinewebshop.net/moviwewofizovuxinetata.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/24b05891-fd44-442c-928c-8573b0c9c580/1667248990.pdfIn PDF document text
    • http://rosevasejila.myartsonline.com/what_is_the_best_sat_prep_course.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_off0000eef1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEF1 4964 bytes
SHA-256: e453d4491ed18e22066d6ab7657edbb01869d41d72c8c9a568bbbb129a8ec26f
font_01_sfnt_off0000ffc4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFC4 10556 bytes
SHA-256: eaa5ef91ff6d0cf12fedf55f5a7bebc0cbbdf020fe3924f9f675bba1799abc7d
font_02_sfnt_off000123c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123C5 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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