Malicious PDF — malware analysis report

Static analysis result for SHA-256 11502bdaa5442c65…

MALICIOUS

PDF

82.5 KB Created: 2021-04-01 14:23:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 01e6f80819bcd06419533e3b2f1fa06c SHA-1: e5dbc35a70e614d4033f0f406b63f1f3cff27aed SHA-256: 11502bdaa5442c65db558ca6681f76f3b5b9eb5f70602cea8f1aabe92474dd7d
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The file contains a large number of external links pointing to various PDF files hosted on disposable domains, a common tactic for SEO link farms and phishing campaigns. The presence of multiple distinct hosts and the use of UTM parameters suggest an attempt to drive traffic to potentially malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://maypoin.ru/aws?utm_term=two+reason+for+writing+the+declaration+of+independence PDF link annotation
    • http://matemepujibad.scienceontheweb.net/status_quo_definicion.pdfIn PDF document text
    • https://birivisixakaxe.weebly.com/uploads/1/3/4/6/134608058/wemer.pdfIn PDF document text
    • https://cdn.sqhk.co/bopibege/ghhgXjb/40665348822.pdfIn PDF document text
    • https://nawuwisenaz.weebly.com/uploads/1/3/5/3/135318134/kepijesisor.pdfIn PDF document text
    • https://muduzefob.weebly.com/uploads/1/3/4/0/134018051/9289515.pdfIn PDF document text
    • https://cdn.sqhk.co/dafisuwikib/jegigcG/best_buy_south_austin_hours.pdfIn PDF document text
    • https://fewevivib.weebly.com/uploads/1/3/0/8/130813821/zefixiv.pdfIn PDF document text
    • https://cdn.sqhk.co/lijuwezasip/ih3SOhj/doxubedamodebamaka.pdfIn PDF document text
    • https://sararilaba.weebly.com/uploads/1/3/1/4/131482808/2f8e0174e80823.pdfIn PDF document text
    • https://jikurufor.weebly.com/uploads/1/3/4/6/134613562/nefapavevupi-fasew-gibugivi-rezakopi.pdfIn PDF document text
    • https://xizevidunofi.weebly.com/uploads/1/3/4/3/134321119/begobokuxaburar.pdfIn PDF document text
    • http://wejuveziwep.mypressonline.com/economics_of_agroforestry_systems.pdfIn PDF document text
    • https://jalebipozufi.weebly.com/uploads/1/3/5/3/135320073/810417.pdfIn PDF document text
    • http://pifedalune.medianewsonline.com/placental_retention.pdfIn PDF document text
    • https://cdn.sqhk.co/givujelised/lgjXcgg/digiwulagenaxuvunalime.pdfIn PDF document text
    • https://pigunakates.weebly.com/uploads/1/3/4/6/134628742/60f27191f9.pdfIn PDF document text
    • https://cdn.sqhk.co/xapanularopu/Kignhhh/kabefoganefesulonuxe.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://656adf98-7a81-40bd-8d0f-2b9c27d09201.filesusr.com/ugd/268ab1_8ecee14f433343a6a67ccac808ccb441.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wemofodi/fopudugujabaxelabom.pdfIn PDF document text
    • http://xipanizi.myartsonline.com/fawisa.pdfIn PDF document text
    • https://c534e673-b245-4a6d-8787-855fe96db707.filesusr.com/ugd/e19215_e363999abd0642bfaee1bc3cabf58d4c.pdf?index=trueIn PDF document text
    • https://770cee9b-59ea-4c2b-ae8d-aad83b0abb79.filesusr.com/ugd/8b25c7_2428bb25172f45d6b3ea79bb898fa515.pdf?index=trueIn PDF document text
    • https://12c21f6a-324e-488c-af83-7e1076049286.filesusr.com/ugd/e84f25_1396a87306424fef8f82b990ff41e446.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xukanomarexumu/platform-_tools_folder_of_sdk_directory.pdfIn PDF document text
    • http://nomamazuzut.atwebpages.com/1997_mercruiser_3.0_lx_service_manual.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f817.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF817 5244 bytes
SHA-256: a9f6b22ec57c0b9270b453e33d8dc20c7a2e666ebd03ee72a46bc59f05b8086d
font_01_sfnt_off000109ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109EF 10516 bytes
SHA-256: 5503527d5d4266c30c9efe9c851b510e7930068c1aa374b2ad6947bbdb63ef54
font_02_sfnt_off00012dec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12DEC 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71

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