Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2306de2464e85a0…

MALICIOUS

PDF

89.4 KB Created: 2021-03-16 10:53:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 3ccce5870187bcd7ea3630c0db196026 SHA-1: 6fc14c8dd3e82642a061d3a5a8e2d18810db30a1 SHA-256: e2306de2464e85a018069e35dacec13e93b2df3425d9fcdb38fadba225b92dcd
184 Risk Score

Malware Insights

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

This PDF document contains a large number of external links, masquerading as a physics textbook solution, which is a common lure for phishing or malware distribution. The heuristic firings indicate a link farm hosted on disposable domains, suggesting a malicious intent to redirect users to potentially harmful content. While no scripts were explicitly extracted, the PDF structure and link farm behavior are strong indicators of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6697

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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
  • 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://golowaki.ru/strik?utm_term=libro+de+f%25C3%25ADsica+2+bgu+resuelto+2020 PDF link annotation
    • https://zexonozanefamiw.weebly.com/uploads/1/3/1/1/131163740/kofomobime.pdfIn PDF document text
    • http://todayit.pro/171303625472p89a.pdfIn PDF document text
    • http://tanolugulutewu.medianewsonline.com/resmed_airsense_10_autoset_how_to_adjust_pressure.pdfIn PDF document text
    • http://sozaxesugoj.mywebcommunity.org/13148805287.pdfIn PDF document text
    • https://fogasofimoxor.weebly.com/uploads/1/3/1/0/131071298/xidokalot.pdfIn PDF document text
    • https://livupojinobiz.weebly.com/uploads/1/3/1/8/131856358/rofatewefit_lusidapufe.pdfIn PDF document text
    • https://nunibuzobaga.weebly.com/uploads/1/3/0/7/130740367/vonivegojukevo.pdfIn PDF document text
    • http://study-english-04.space/wabimuvonamujapodo0lz5y.pdfIn PDF document text
    • http://reloturuvum.22web.org/34023479522.pdfIn PDF document text
    • https://pojekemo.weebly.com/uploads/1/3/4/4/134469054/jodiv_fitomoku_papenusujenu_gisak.pdfIn PDF document text
    • http://poxumanavofeboz.scienceontheweb.net/logical_reasoning_examples_with_answers.pdfIn PDF document text
    • http://potuxoposutu.medianewsonline.com/sahaja_yoga_chakras.pdfIn PDF document text
    • http://kopogaxepaku.sportsontheweb.net/31893347835.pdfIn PDF document text
    • http://dufifudusimube.mygamesonline.org/sibigiwovivinumepu.pdfIn PDF document text
    • http://biwiroxefamir.mywebcommunity.org/tnpsc_assistant_system_engineer_syllabus.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://rofuvawitarul.atwebpages.com/why_is_my_john_deere_mower_not_starting.pdfIn PDF document text
    • https://0296ecfc-28ae-4fa5-925c-67a25994cace.filesusr.com/ugd/c88839_6419173bd3a24bf7a065b43cbb9260c1.pdf?index=trueIn PDF document text
    • https://e0fa0743-814d-41de-b6a5-47f787911882.filesusr.com/ugd/89d2ef_31cca1a4448d462194e4393e180e8498.pdf?index=trueIn PDF document text
    • http://sewoxoxitif.rf.gd/dowaxawofumagof.pdfIn PDF document text
    • https://1bf92926-22d0-44a1-94fb-b51843c41cd5.filesusr.com/ugd/762c1a_7debd33fc1944a8295ae74d041f94014.pdf?index=trueIn PDF document text
    • https://9526c93a-d340-4dca-b5fd-2864ff0888c4.filesusr.com/ugd/4c3d6a_fbb41a746f694636ac2401618b74dc85.pdf?index=trueIn 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_off00011c9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C9B 5376 bytes
SHA-256: d68fc817ad64ab81e0e9f3e7d1a8e1e66f39215e18d70929295299075de1a4a5
font_01_sfnt_off00012ef7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12EF7 13668 bytes
SHA-256: 3b974e6809ea7fb62903ceaacf362c4edefc55769e23b4fe86fa61ea34887158

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