Malicious PDF — malware analysis report

Static analysis result for SHA-256 677da423d94ef67d…

MALICIOUS

PDF

73.9 KB Created: 2021-06-04 22:16:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 0f4b1c9bee8c0bdee799664ec08165d4 SHA-1: 5ee88346cfeebe8ca4c4a84c79645622b28a366a SHA-256: 677da423d94ef67d8c9e8654e550c57d82e65d82e73b04ac44974064cc0e03e4
186 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, many pointing to disposable hosting services, suggesting a link farm or phishing operation. The document body, though heavily obfuscated, contains text related to movie downloads, which is likely a lure to entice users to click on the malicious links. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

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://queure.ru/pbw?utm_term=khatrimaza+hollywood+movies+in+hindi+dubbed+download+free PDF link annotation
    • https://ludakugoru.weebly.com/uploads/1/3/4/6/134698973/3044721f.pdfIn PDF document text
    • https://tenimevu.weebly.com/uploads/1/3/4/3/134315692/2999775.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409238/normal_60388b52dc921.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470836/normal_5fd706abb9020.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387046/normal_606dd716ee1e5.pdfIn PDF document text
    • https://movobukibajub.weebly.com/uploads/1/3/4/5/134597216/a32afa260.pdfIn PDF document text
    • https://denijebif.weebly.com/uploads/1/3/4/5/134584122/cde8a3093f95.pdfIn PDF document text
    • https://biwoponafi.weebly.com/uploads/1/3/4/7/134767969/govaramoju.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413240/normal_5fdbb597839b0.pdfIn PDF document text
    • https://lurenejaxerugu.weebly.com/uploads/1/3/4/7/134728533/2cc737b9e940d.pdfIn PDF document text
    • https://sadejakudabad.weebly.com/uploads/1/3/5/9/135965210/zezowekepivu.pdfIn PDF document text
    • https://powipawi.weebly.com/uploads/1/3/4/3/134313445/tabofamumim.pdfIn PDF document text
    • https://tojemevu.weebly.com/uploads/1/3/1/3/131384016/bafijobesono_wujazasexobos_dutifomuzumir.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385010/normal_602d5c91bffd3.pdfIn PDF document text
    • https://momigetufi.weebly.com/uploads/1/3/4/8/134876151/xilikavosenofo-kefepolafidajam.pdfIn PDF document text
    • https://damijuvik.weebly.com/uploads/1/3/1/3/131381376/nuturowamefuweki.pdfIn PDF document text
    • https://devanuwi.weebly.com/uploads/1/3/0/9/130969177/acac289949.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pulixojesu.pbworks.com/w/file/fetch/144489027/biritinig.pdfIn PDF document text
    • http://gosirata.pbworks.com/w/file/fetch/144457401/69596576265.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9fe7a20a-5eb3-42b0-a120-6239119109bd/52259735724.pdfIn PDF document text
    • http://nilanom.pbworks.com/f/context_clues_worksheets_with_answer_key.pdfIn PDF document text
    • http://faxamom.pbworks.com/f/what_is_the_molecular_geometry_of_if2-.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/45fcba45-2525-4083-b0dc-79e6d17f574c/gogoxebi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a610e458-a92f-404c-b501-bb5212bd8875/how_does_a_killswitch_work.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_off0000e1e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1E7 5560 bytes
SHA-256: 42927d85bb55d6457b2552b32e65d965bd1fffd204c4b5200efd81efe928b6fa
font_01_sfnt_off0000f4ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4CA 10792 bytes
SHA-256: e6a4c9b7d0265e75ee566d876423131cc09ba9ad2d86cb7ae0a309d553047743