Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c7705f150de6bca…

MALICIOUS

PDF

90.7 KB Created: 2021-04-30 01:31:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 59f6e84380821e3ff969f6d390b6a631 SHA-1: d7714ca98723c601bead1058271e015019e59729 SHA-256: 2c7705f150de6bca1de8a2404dc2486c4b5b7cbac2e11bbf1719f007eb5f209e
224 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous embedded links, with at least one pointing to known malicious redirector infrastructure. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a large number of links hosted on disposable domains, suggesting an attempt to obscure malicious destinations. The 'SE_PASSWORD_ARCHIVE_LURE' heuristic suggests the document may be part of a multi-stage attack involving password-protected archives, a common tactic to bypass security scanners.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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.
  • 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://yafferge.ru/strik?utm_term=can%2527t+connect+to+my+linksys+extender In PDF document text
    • http://wupidubame.mywebcommunity.org/cut_and_paste_online_free.pdfIn PDF document text
    • http://genoray.pro/carrier_floor_standing_air_conditioner_catalogue5qp6n.pdfIn PDF document text
    • http://busijizi.medianewsonline.com/6726091758.pdfIn PDF document text
    • https://zopadujebononi.weebly.com/uploads/1/3/1/3/131380983/lofegufoso-pawof-bakum-nebeferoronod.pdfIn PDF document text
    • http://deemonatrafik.xyz/911673577f4v07.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374203/normal_6002853b7511b.pdfIn PDF document text
    • http://legko.travel/52285208692zthcw.pdfIn PDF document text
    • http://ridaxaki.mywebcommunity.org/all_bank_exam_syllabus_2020.pdfIn PDF document text
    • https://vewenikeluw.weebly.com/uploads/1/3/0/7/130739128/xisewivarimuloduxogo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374533/normal_604fd283b38f1.pdfIn PDF document text
    • http://stonersfranchise.com/607277652197mpq6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496153/normal_60632e61a578f.pdfIn PDF document text
    • http://helpcreditscore.info/61300534988gj2wa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4453537/normal_5fc6cd515ee2b.pdfIn PDF document text
    • https://wetebaxa.weebly.com/uploads/1/3/4/3/134343617/2915694.pdfIn PDF document text
    • https://lulaxakopoto.weebly.com/uploads/1/3/4/3/134331182/ed832a3.pdfIn PDF document text
    • http://petrol-v-pol-price.site/kerosene_heater_repairs496do.pdfIn PDF document text
    • https://kajizifobizixa.weebly.com/uploads/1/3/3/9/133997117/xilalininitot-kikitatogunuxup-dupasaxu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427506/normal_605838b329292.pdfIn PDF document text
    • http://magic-spring.com/farevobefolin5uq04.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/wutisigila/united_colors_of_benetton_india_shoes.pdfIn PDF document text
    • http://nibizuladode.onlinewebshop.net/the_power_book_review.pdfIn PDF document text
    • https://s3.amazonaws.com/midaguvimabof/vemawuxawipig.pdfIn PDF document text
    • https://s3.amazonaws.com/buganabowumujef/16611772769.pdfIn PDF document text
    • https://s3.amazonaws.com/bitizopovopaso/rehabilitacja_po_endoprotezoplastyce_stawu_biodrowego.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_off00012683.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12683 5260 bytes
SHA-256: a7a520991ba993849846dbd1bd8f1fe52eafcea8d8ed948ec4c32c823115206e
font_01_sfnt_off0001385c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1385C 10792 bytes
SHA-256: 2eea5e4cf459fdbb3eaac95cb2e11a84c1cabf28880c2cefd0bdf3fcce0fa123

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