Malicious PDF — malware analysis report

Static analysis result for SHA-256 64cdaca3d512e46d…

MALICIOUS

PDF

74.6 KB Created: 2021-03-06 07:53:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 2d8fb4af1537c1e8e321a5fbb5ab0075 SHA-1: b0bfb1e76b4b760e3c8f8dc5192caaa3906b8a0e SHA-256: 64cdaca3d512e46dfa8a6761ad776b47c1f3ed8de9be6bc2804a935b357bb067
186 Risk Score

Malware Insights

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

This PDF document contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing operation. The primary URL, 'https://lozipotod.ru/123?utm_term=how+long+to+cook+tater+tots+in+waffle+iron', is presented as a search query, a common lure for phishing. While no scripts were explicitly extracted, the PDF structure and numerous external links strongly indicate malicious intent, likely for credential harvesting or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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://lozipotod.ru/123?utm_term=how+long+to+cook+tater+tots+in+waffle+iron PDF link annotation
    • http://dodunagosukew.iblogger.org/77306906716.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463277/normal_60317fa17305d.pdfIn PDF document text
    • https://vavavutexe.weebly.com/uploads/1/3/4/4/134441002/zowafiluvo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484370/normal_6030cc9cb0814.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413370/normal_6013c05b92c1b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417815/normal_60001fba41d81.pdfIn PDF document text
    • https://lirujisigibat.weebly.com/uploads/1/3/0/8/130874608/155cbbe.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454306/normal_60030b4320928.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459025/normal_5ffdedc64c0ce.pdfIn PDF document text
    • https://zajefogana.weebly.com/uploads/1/3/1/4/131407312/tarikapimub.pdfIn PDF document text
    • https://vobasonuniba.weebly.com/uploads/1/3/4/6/134668907/2128902.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/67dc6fc6-f2a3-43ce-b3d7-841d716eecaa/xexokokawidapol.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0466f1df-81d8-4d5a-9f2d-a9757ddd6f9e/stock_market_open_tomorrow_morning.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/87af5da9-ac41-4d25-96cd-e5c1d88a834a/wobubuvak.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a19879b4-3542-4f37-bd17-7e3bbd4fc5c5/mujagipetirixakulu.pdfIn PDF document text
    • http://pomirunorejuso.epizy.com/enterobacterias_gram_negativas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/77b51979-120b-439f-81fc-671414591241/kayla_itsines_bbg_beginner.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8460f5de-ea48-4d18-84f5-bf589bb793eb/apple_ipod_classic_5th_generation_black_30gb_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f90ca33a-2930-4b69-9ecd-317d1e9b33cd/slater_and_norman_books_in_order.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_off0000e6b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6B9 5164 bytes
SHA-256: 026b8a7483737b9dc30c0f198aaa5cc9b615cf7dab774bf80097434baba22f27
font_01_sfnt_off0000f876.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF876 10748 bytes
SHA-256: ee198c0a51d6da0280201386e2440ec0a80d174d09fd9c2e900afc2d63eefc67