Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb83d70e0664e18d…

MALICIOUS

PDF

75.6 KB Created: 2021-02-27 16:48:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: 223f50b479b9d982e6e0265b368e6220 SHA-1: 76fe44d8b4ff5f2d87ca771ddea8e0b2a27f2147 SHA-256: eb83d70e0664e18dc10125c72825f2ecdbca7693847b1596a6b7855463b5c561
66 Risk Score

Malware Insights

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

The PDF document contains an embedded URL that mimics a search query for password reset information, a common lure for phishing or malware delivery. The ML classifier strongly indicated maliciousness, and the PDF structure includes a link farm on disposable hosting, further suggesting malicious intent. No scripts were extracted, but the presence of external URIs and the ML classification point to a likely attempt to redirect the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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://gimoguvi.ru/strik?utm_term=how+do+i+reset+my+ubee+router+password PDF link annotation
    • https://maposege.weebly.com/uploads/1/3/1/3/131378999/febirokaduzo-zunalazosudoj-voxopero.pdfIn PDF document text
    • http://swiss-gear.shop/89608910721q3vfd.pdfIn PDF document text
    • https://pegiromilu.weebly.com/uploads/1/3/4/6/134683304/4379219.pdfIn PDF document text
    • https://zewadozodatigi.weebly.com/uploads/1/3/4/3/134337643/1b3a317ea426edd.pdfIn PDF document text
    • http://goladelexugezi.sportsontheweb.net/5387980597.pdfIn PDF document text
    • http://lnstagram-verificationbadgeform.com/hyflex_rotary_files6qw7c.pdfIn PDF document text
    • http://naliputa.mywebcommunity.org/51057915819.pdfIn PDF document text
    • http://xoxuvajes.mywebcommunity.org/nujogajop.pdfIn PDF document text
    • https://katalulipof.weebly.com/uploads/1/3/2/7/132710678/bagoruragisef_tikatab_zarufalifaris.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/lerezazo/60239907060.pdfIn PDF document text
    • http://kakasis.onlinewebshop.net/vimog.pdfIn PDF document text
    • https://s3.amazonaws.com/podawakumepewez/aliexpress_old_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/savifin/kexesatetegavizul.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_off0000ea87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA87 5368 bytes
SHA-256: ba360b9b43a96695226652ec3e582c928636206082be678dfeaf9f6c70fc7da0
font_01_sfnt_off0000fcb7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCB7 10888 bytes
SHA-256: 1bc926cfabf2dedd2efece2513235a5b808354326dafd42424be5bb37121f7dc

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