Malicious PDF — malware analysis report

Static analysis result for SHA-256 11415a7c697c931d…

MALICIOUS

PDF

75.4 KB Created: 2021-06-09 07:32:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2279db673e634581949448b56c113d65 SHA-1: debb0735e74f8da82bab675de1fab4ffccc7f55a SHA-256: 11415a7c697c931d73e2f6faf790961fd39536dae1d67401068126c144f6a432
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to drive traffic to malicious sites. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or scamming operations. Although no scripts were explicitly extracted, the PDF structure and link farm heuristics point towards a malicious document designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 6

  • 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.
  • 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 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://allytemp.ru/pbw?utm_term=big+little+farmer+unlimited+money+and+gems
    • https://minomawisagu.weebly.com/uploads/1/3/5/9/135956859/dafisij.pdf
    • https://dalupapixoriwu.weebly.com/uploads/1/3/1/4/131438121/kefoto.pdf
    • https://funovupudejo.weebly.com/uploads/1/3/4/4/134473131/dazofe.pdf
    • https://lozavogifod.weebly.com/uploads/1/3/4/4/134482976/4185082.pdf
    • https://dironirodog.weebly.com/uploads/1/3/4/7/134760169/rawimivasebegozuja.pdf
    • https://mirexoxufi.weebly.com/uploads/1/3/0/9/130969656/2971894.pdf
    • https://nijubalalo.weebly.com/uploads/1/3/1/4/131453980/gitonamulatitotane.pdf
    • https://rumuzejisu.weebly.com/uploads/1/3/5/3/135349165/wimekuxed.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://kipizasuzeda.pbworks.com/w/file/fetch/144907389/chemical_principles_8th_edition.pdf
    • http://rugewenuzed.pbworks.com/f/waec_further_maths_past_questions_and_answers.pdf
    • http://nadupodifado.pbworks.com/f/the_incredible_hulk_full_movie_in_hindi_free_download_filmyzilla.pdf
    • https://uploads.strikinglycdn.com/files/ee7c2343-a602-4733-be6a-8b3abcd5a98f/download_ets2_android_indonesia_apk_data.pdf
    • http://wotasaful.pbworks.com/f/3784701268.pdf
    • http://kemususi.pbworks.com/w/file/fetch/144752412/vooks_teacher_sign_in.pdf
    • http://detomipipu.pbworks.com/f/wanawun.pdf
    • http://gupiguna.pbworks.com/w/file/fetch/144557547/sharp_tv_remote_control_codes.pdf
    • http://jajafad.pbworks.com/w/file/fetch/144419145/suvarudezi.pdf
    • http://sipibujewadu.pbworks.com/f/vefilinuvilalodezevo.pdf
    • https://uploads.strikinglycdn.com/files/f9c90a3f-2f9d-47d6-a5b3-c43c66336417/13458513683.pdf
    • https://uploads.strikinglycdn.com/files/4f4c720b-6bda-48bc-a078-74c5581fa51c/77739037160.pdf
    • https://uploads.strikinglycdn.com/files/df486a56-ef0f-47a3-aa04-e564bd4bd305/81980350288.pdf
    • http://jajafad.pbworks.com/w/file/fetch/144726357/wuxedasejamimugufa.pdf
    • https://uploads.strikinglycdn.com/files/b3df4938-9cea-4cf6-a4f6-affe859351d3/what_are_the_characteristics_of_sunlight.pdf
    • http://pilujibos.pbworks.com/w/file/fetch/144486792/mimuvuvokufim.pdf
    • http://kedetuwi.pbworks.com/f/pewazonozaj.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ea6f.bin
9565d455151e40b4d84f891879eef420fd3c0c27f69feab34074f8b3be7f2a7a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEA6F 5376 bytes
font_01_sfnt_off0000fcb2.bin
8ddfbca0a3d79cb3930d2fb5832443fa2b2112746255d7cce2a69c0208a68f37		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFCB2 10272 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.