Malicious PDF — malware analysis report

Static analysis result for SHA-256 c14c92be0800ee95…

MALICIOUS

PDF

44.4 KB Created: 2020-10-29 08:59:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: fe01d2818871ebe2f78cbf9287bd8838 SHA-1: 251e9aa777ab636cb83e6cfb74fc111efda8f923 SHA-256: c14c92be0800ee95360b4d46f0ceb80c5dc17c5fdd639d6dfafd4f50f02a9573
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, with the primary one redirecting to a malicious domain. The document body, though heavily obfuscated, contains text that appears to be a lure for 'case study answers', suggesting a phishing or scam attempt. The ML classifier strongly flagged this PDF as malicious, and the presence of a redirector link confirms malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://ttraff.club/pify?keyword=decoding+the+flu+case+study+answers In PDF document text
    • https://lagafuxomip.weebly.com/uploads/1/3/4/3/134347440/3fb158ac7.pdfIn PDF document text
    • https://ximazula.weebly.com/uploads/1/3/0/7/130738777/jetoge-jarazesizu-zekivep.pdfIn PDF document text
    • https://lesofetu.weebly.com/uploads/1/3/1/3/131378838/043f03a.pdfIn PDF document text
    • https://xavoxoxuda.weebly.com/uploads/1/3/1/3/131379246/c5612abb5e9a4b4.pdfIn PDF document text
    • https://pesajupamobe.weebly.com/uploads/1/3/1/6/131607203/vazodomaveju.pdfIn PDF document text
    • https://gazesomudari.weebly.com/uploads/1/3/1/0/131070071/zukukepulado.pdfIn PDF document text
    • https://xijoxamapapi.weebly.com/uploads/1/3/4/3/134337958/wuvafaferexo.pdfIn PDF document text
    • https://ruwadegefanum.weebly.com/uploads/1/3/4/1/134108857/2057721.pdfIn PDF document text
    • https://tisefujuset.weebly.com/uploads/1/3/4/4/134488269/nurujuv_lunile_dibenisufujunap.pdfIn PDF document text
    • https://jubunukaf.weebly.com/uploads/1/3/1/4/131483214/9371271.pdfIn PDF document text
    • https://jemajodelevo.weebly.com/uploads/1/3/4/3/134394711/961a7a8cf7d312b.pdfIn PDF document text
    • https://xepuxewezikute.weebly.com/uploads/1/3/4/4/134437058/2744694.pdfIn PDF document text
    • https://zinikedefi.weebly.com/uploads/1/3/0/7/130740178/7605536.pdfIn PDF document text
    • https://fevuxutub.weebly.com/uploads/1/3/4/1/134131759/bedegujesul-xijurolalamiti-zumejuveduxux-fexaku.pdfIn PDF document text
    • https://juzomewe.weebly.com/uploads/1/3/4/3/134350864/xidinimaz.pdfIn PDF document text
    • https://pakezumada.weebly.com/uploads/1/3/4/3/134368128/6309143.pdfIn PDF document text
    • https://paripipedaninez.weebly.com/uploads/1/3/4/4/134444050/xuroramuniso_luxewepirofob_metelofimupa.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/sajatesawodiji/tatezilifomogo.pdfIn PDF document text
    • https://s3.amazonaws.com/wonoti/7110758582.pdfIn PDF document text
    • https://s3.amazonaws.com/susopuzupure/schengen_visa_application_form_france.pdfIn PDF document text
    • https://s3.amazonaws.com/nezanurugega/atheist_books_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/leguvefu/bremsstrahlung_radiation.pdfIn PDF document text
    • https://s3.amazonaws.com/guvovigo/brickmania_instructions.pdfIn PDF document text
    • https://s3.amazonaws.com/gebaxovudofe/psychsim_5_forgetting_worksheet_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/gupuso/ansar_vdp_circular_2019.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_off00006efc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6EFC 5476 bytes
SHA-256: 732c555c62faa8c8be7534e40cb9d8e5cf29a479f23c395dd9da9b76ea7443f8
font_01_sfnt_off000081bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x81BC 10056 bytes
SHA-256: efd2c9e3c6d1408a59609964e08bc5095bc778245df26b6db443f8b7c8e11476

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