Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d9c200b33aa5f9e…

MALICIOUS

PDF

75.8 KB Created: 2021-05-27 05:42:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 52554265370056a08777db1e8c596883 SHA-1: 64e3f03ad69003513cc1d71dc29054493db93688 SHA-256: 2d9c200b33aa5f9eaadddfbabd576b5d6c5cecbf0365495b94584c274ad66525
186 Risk Score

Malware Insights

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

This PDF file is identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to redirect users to malicious content. The document body, though heavily obfuscated, appears to be a lure related to technical support, aiming to trick users into clicking these links.

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://nipisod.ru/strik?utm_term=how+do+i+reset+my+airport+extreme+to+factory+settings PDF link annotation
    • https://lanigitekepag.weebly.com/uploads/1/3/4/3/134395773/gatulewunak.pdfIn PDF document text
    • https://zubisixoligifi.weebly.com/uploads/1/3/4/4/134479514/piguwerozoxu_waxafunibaziwa.pdfIn PDF document text
    • https://toxinezewam.weebly.com/uploads/1/3/1/4/131452950/c99b08437d0.pdfIn PDF document text
    • https://bapefakujina.weebly.com/uploads/1/3/4/4/134483882/7338767.pdfIn PDF document text
    • https://tokikagusiwa.weebly.com/uploads/1/3/4/0/134096322/9454131.pdfIn PDF document text
    • https://tusukufuduma.weebly.com/uploads/1/3/4/4/134458322/zaduj.pdfIn PDF document text
    • https://zumegopepotiko.weebly.com/uploads/1/3/1/3/131398003/fijevuzaxazedif.pdfIn PDF document text
    • https://dexanefuv.weebly.com/uploads/1/3/1/3/131383512/5341690.pdfIn PDF document text
    • https://velawavasikene.weebly.com/uploads/1/3/5/4/135400921/828254.pdfIn PDF document text
    • https://nuvugokub.weebly.com/uploads/1/3/4/0/134016684/82087eb675591fb.pdfIn PDF document text
    • https://repemokalit.weebly.com/uploads/1/3/1/8/131856723/98e1d1523dd4e.pdfIn PDF document text
    • https://nuresipaxujetun.weebly.com/uploads/1/3/4/6/134683077/fepeziwasusova.pdfIn PDF document text
    • https://zeduboxaturuje.weebly.com/uploads/1/3/7/5/137502279/90ec7d4.pdfIn PDF document text
    • https://varusimutajol.weebly.com/uploads/1/3/4/5/134502614/jaxolexinit.pdfIn PDF document text
    • https://legovizadedugid.weebly.com/uploads/1/3/1/8/131856283/8478343.pdfIn PDF document text
    • https://doselarifiniwa.weebly.com/uploads/1/3/2/8/132814949/35c6e24cb5c99.pdfIn PDF document text
    • https://puzuzabijil.weebly.com/uploads/1/3/2/8/132814257/3b664f12c77c9.pdfIn PDF document text
    • https://dafepigog.weebly.com/uploads/1/3/4/6/134605944/3e28cfb.pdfIn PDF document text
    • https://guxisawupejova.weebly.com/uploads/1/3/0/8/130814058/nijamokubexov.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000e897.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE897 5668 bytes
SHA-256: 723657fe9d2a44d8162397063dd67abd0f2494bad0b3ccbd7a9e5f1545c0426c
font_01_sfnt_off0000fbe5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBE5 11024 bytes
SHA-256: ef3095990700794d1878a028e4a4233e783e5039cb06436f77ddc4ed2c00d107

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