Malicious PDF — malware analysis report

Static analysis result for SHA-256 f1f5b734f9e6f4cb…

MALICIOUS

PDF

92.2 KB Created: 2021-05-10 17:17:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 570b402edc1643d90c233cd342916ad6 SHA-1: 5463679acd25d7968d3c3ced3bf30a54a399b296 SHA-256: f1f5b734f9e6f4cb566571be2f3a63eb0d315a31f31339f14ae6eede3b58260c
186 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://botokaw.ru/strik?utm_term=how+to+change+battery+timex+1854 PDF link annotation
    • http://gakawisogafuga.mygamesonline.org/what_is_the_theme_of_the_book_code_talker.pdfIn PDF document text
    • http://sifisomatexow.sportsontheweb.net/50019836130.pdfIn PDF document text
    • https://tegidaweriwasul.weebly.com/uploads/1/3/1/4/131483440/962d145cf60cdc7.pdfIn PDF document text
    • https://cdn.sqhk.co/pugepavofu/ieBhdjh/wufipiwoberorimoxidazoge.pdfIn PDF document text
    • https://daluwora.weebly.com/uploads/1/3/4/3/134319963/1497308.pdfIn PDF document text
    • http://dakisemakegag.sportsontheweb.net/harry_potter_and_the_cursed_child_movie_october_2020.pdfIn PDF document text
    • http://goxaterajeronaf.22web.org/62524633152.pdfIn PDF document text
    • http://febiterozoz.medianewsonline.com/88898310008.pdfIn PDF document text
    • http://tafuxasomup.getenjoyment.net/geometric_sequence_kuta.pdfIn PDF document text
    • http://zigapajuxijado.mywebcommunity.org/65557998144.pdfIn PDF document text
    • https://kitabenulo.weebly.com/uploads/1/3/0/9/130969432/5141432.pdfIn PDF document text
    • http://xevojifixifepi.scienceontheweb.net/12621710025.pdfIn PDF document text
    • http://zutatowatipo.mywebcommunity.org/34849767207.pdfIn PDF document text
    • https://cdn.sqhk.co/tevotapomow/Mgcghxr/siwuga.pdfIn PDF document text
    • https://wefogazasu.weebly.com/uploads/1/3/4/8/134880183/223813.pdfIn PDF document text
    • http://fazurusitu.getenjoyment.net/benzopireno_en_alimentos.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://3dcfbd4a-ef33-49dc-a04a-0aaf5307c30d.filesusr.com/ugd/b47706_0863562414c44d5194a0ee9b5c45ad31.pdf?index=trueIn PDF document text
    • http://toxukofotu.rf.gd/webaxudo.pdfIn PDF document text
    • http://sukokovevaz.atwebpages.com/56564655075.pdfIn PDF document text
    • https://b24182fa-1fee-416c-9f57-41d8a36573e1.filesusr.com/ugd/1cc367_01a60f46c70549fc8c66bab14fa0f1c1.pdf?index=trueIn PDF document text
    • https://d8aee3b0-83ea-4a0d-b8f9-524a85b41d10.filesusr.com/ugd/105b34_ac01fea5b1404da2b395c1e46397e87a.pdf?index=trueIn PDF document text
    • http://tamedigozetot.epizy.com/gigebotiberiwas.pdfIn PDF document text
    • https://de315c38-daa2-4293-b666-e554ba9b7d65.filesusr.com/ugd/564d2e_59412974682c49e5b3f436dcb2a27be9.pdf?index=trueIn PDF document text
    • https://5d9de69b-f80b-44d6-9c2d-9027806fef0b.filesusr.com/ugd/e26ad2_19805be90a99496db1d1c99e0720fd81.pdf?index=trueIn 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_off00012751.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12751 5824 bytes
SHA-256: 475f7b075b7c71e2bbd049b500f15319989113c4e5ffedbff15f599a924bd39f
font_01_sfnt_off00013b27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13B27 11940 bytes
SHA-256: 90660c1ac94a6d63a51051d3ff16fee260f2fa0cef1af78cc92c7180cbcf970d