Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c4e7449791aa34a…

MALICIOUS

PDF

78.8 KB Created: 2021-01-24 03:47:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: aba9f5fb2b2a77ab62f93a5771674f28 SHA-1: ca8821a02f52e68f07050bc9867740bd222b5cec SHA-256: 7c4e7449791aa34a8c317e9d1f20029000c786b1c5a9b6fbfd906d35d02abe7c
254 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link T1059.007 JavaScript

The PDF contains multiple heuristics indicating a link farm and credential phishing lure, specifically impersonating the 'Target' brand. The presence of external URIs and a link farm on disposable hosting suggests an attempt to distribute malicious content or redirect users to phishing sites. The ML classifier and ClamAV detection strongly support the malicious verdict.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 8

  • 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 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.
  • Brand-impersonation credential phishing lure critical SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: action link to abused redirector https://ginugifugebiner.weebly.com/uploads/1/3/4/2/134234672/wapoxaporinogozite.pdf.
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://traffnew.ru/123?utm_term=isu+health+services+birth+control PDF link annotation
    • https://cdn.sqhk.co/goworonol/ifgfJ6n/world_s_first_rotating_skyscraper_in_dubai.pdfIn PDF document text
    • https://cdn.sqhk.co/jabakujivim/Iogg3Iq/25468069406.pdfIn PDF document text
    • https://ginugifugebiner.weebly.com/uploads/1/3/4/2/134234672/wapoxaporinogozite.pdfIn PDF document text
    • https://cdn.sqhk.co/detaludolef/gghjigy/xekimise.pdfIn PDF document text
    • https://cdn.sqhk.co/demexadol/BJidhif/infinity_heroes_idle_rpg_mod_apk.pdfIn PDF document text
    • https://sipigatijuk.weebly.com/uploads/1/3/3/9/133999294/0ee627d66dc95.pdfIn PDF document text
    • https://cdn.sqhk.co/rujiwujik/agiT9hd/51216507630.pdfIn PDF document text
    • https://vizumijolotetip.weebly.com/uploads/1/3/5/3/135394273/2507833.pdfIn PDF document text
    • https://cdn.sqhk.co/salobosemiv/fejchhh/56851828157.pdfIn PDF document text
    • https://rokajovata.weebly.com/uploads/1/3/4/3/134376264/ed513cb3a31cd7c.pdfIn PDF document text
    • https://cdn.sqhk.co/tajiwikiter/hc6w85n/22861782610.pdfIn PDF document text
    • https://cdn.sqhk.co/vifamepupib/bGYjice/pifoxukadoje.pdfIn PDF document text
    • https://cdn.sqhk.co/sovokeduseb/NVkPjfY/giwajanaselefatewoko.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zenejifawulo.epizy.com/bizerba_slicer_gsp_hd_manual.pdfIn PDF document text
    • http://xuvunemomot.epizy.com/gratuity_calculator_uae_2018_excel_template.pdfIn PDF document text
    • https://s3.amazonaws.com/xuxifuzituwu/blackberry_bold_ringtone.pdfIn PDF document text
    • https://s3.amazonaws.com/tajimipojimo/pixalun.pdfIn PDF document text
    • http://pevivudawof.epizy.com/open_office_spreadsheet_functions_list.pdfIn PDF document text
    • http://fonimegalidoxu.epizy.com/deer_zentangle_coloring_sheet.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_off0000fa22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA22 5024 bytes
SHA-256: 2c916e92cbe240b5be057a49b43ee714ccc706c4b64247decdc6b0de94834e61
font_01_sfnt_off00010b36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B36 10112 bytes
SHA-256: 5042bf6f703aed2d98c0059f2147d5a6bb4747d7a10db3251a9fec758424668e

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