Malicious PDF — malware analysis report

Static analysis result for SHA-256 8335a53b75501688…

MALICIOUS

PDF

72.6 KB Created: 2021-06-03 16:54:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 019047c1652b305af088960ef86aa32c SHA-1: d700903865870dfca010c145d76f9fa26687c96d SHA-256: 8335a53b75501688f35096edfa2b8c4ee85ec3f1989ec800b698071f9b5065c7
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with a critical heuristic identifying it as a PDF link farm. One of the primary links points to 'allytemp.ru', suggesting a phishing or malicious content delivery attempt. The presence of multiple Weebly and other PDF hosting links indicates a coordinated effort to distribute potentially harmful content, aligning with spearphishing attachment tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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=who+sang+islands+in+the+stream
    • https://mawafusujomadil.weebly.com/uploads/1/3/5/3/135351104/7517518.pdf
    • https://cdn-cms.f-static.net/uploads/4410414/normal_600f9e9961f82.pdf
    • https://cdn-cms.f-static.net/uploads/4493195/normal_5fd6453a426ee.pdf
    • https://sukewemuzi.weebly.com/uploads/1/3/4/6/134668821/2374452.pdf
    • https://dabemevabun.weebly.com/uploads/1/3/4/4/134476179/nukonapotun.pdf
    • https://cdn-cms.f-static.net/uploads/4444647/normal_600a5f5ac3ad8.pdf
    • https://woliremokeg.weebly.com/uploads/1/3/4/3/134340334/9886479.pdf
    • https://kigodebilak.weebly.com/uploads/1/3/5/2/135297846/ruwabiju-nikapem.pdf
    • https://cdn-cms.f-static.net/uploads/4421205/normal_60671cf8de930.pdf
    • https://static.s123-cdn-static.com/uploads/4386621/normal_5fde7e8d5e49b.pdf
    • https://pipamoximiketo.weebly.com/uploads/1/3/0/9/130969724/b4f149a4dc3ec3a.pdf
    • https://noxazifegem.weebly.com/uploads/1/3/4/5/134596672/a492a415e.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://wozixokumo.pbworks.com/f/bsf_constable_tradesman_admit_card_2018.pdf
    • http://ropotupi.pbworks.com/f/jujamasifi.pdf
    • http://mefijunov.pbworks.com/w/file/fetch/144560376/61136840224.pdf
    • http://tejudafo.pbworks.com/f/zijuwoxanixolosibuwaruma.pdf
    • http://xuvabufoj.pbworks.com/f/how_to_write_up_a_bill_of_sale_for_a_used_car_in_ontario.pdf
    • http://visetululiv.pbworks.com/w/file/fetch/144415284/hidruro_de_calcio_nomenclatura_iupac.pdf
    • http://gatasulupu.pbworks.com/w/file/fetch/144422292/69837674700.pdf
    • http://lakebimutep.pbworks.com/f/year_3_mental_addition_and_subtraction_worksheets.pdf
    • http://lekuzax.pbworks.com/f/gelebonegulufowatuwaf.pdf
    • http://lexibitite.pbworks.com/w/file/fetch/144550698/vibez.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_off0000dec1.bin
1b47b1e59a6c685f12b02bb2c74db51437ad6cf45666b5bfb110e6d882ac09c6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDEC1 5252 bytes
font_01_sfnt_off0000f07f.bin
5b5247652bf13a6d4f90c9e30b47e15dcc243003a02155225aaea5d974aedcdf		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF07F 10876 bytes

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