Malicious PDF — malware analysis report

Static analysis result for SHA-256 1fca5b97d29dcadd…

MALICIOUS

PDF

78.0 KB Created: 2021-03-30 03:37:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 0a6212eb2ce5629dcbd1594a7c03d679 SHA-1: 3bc69d670928c89bd506f111562d2208a0e65e65 SHA-256: 1fca5b97d29dcadd9937bac96d3674bbb4e77f47f19b2304888644fe13fd8152
186 Risk Score

Malware Insights

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

The PDF contains numerous external links, many hosted on disposable domains, indicating a link farm or SEO manipulation tactic. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a malicious document designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://seumenha.ru/award?keyword=benefits+of+technology+in+human+communication+pdf PDF link annotation
    • http://manovina.mypressonline.com/44000567334.pdfIn PDF document text
    • https://jefaganogebe.weebly.com/uploads/1/3/1/4/131437435/4705203.pdfIn PDF document text
    • https://xoxitugupara.weebly.com/uploads/1/3/1/3/131383959/6045637.pdfIn PDF document text
    • http://vadosaj.getenjoyment.net/tirerokuwe.pdfIn PDF document text
    • http://kojijeku.mygamesonline.org/31955372800.pdfIn PDF document text
    • http://godotobekof.scienceontheweb.net/peg_perego_john_deere_tractor_battery_location.pdfIn PDF document text
    • http://rofuxipof.mywebcommunity.org/36007085219.pdfIn PDF document text
    • https://zejoraxiziras.weebly.com/uploads/1/3/5/3/135315695/muzafosizaneki.pdfIn PDF document text
    • https://nopuderegitiber.weebly.com/uploads/1/3/0/7/130775440/jasilisazunugis.pdfIn PDF document text
    • https://zoxexakaxikat.weebly.com/uploads/1/3/0/7/130739387/45e8ce0f3fa.pdfIn PDF document text
    • https://vomanoxugorufo.weebly.com/uploads/1/3/5/3/135331351/e23ba.pdfIn PDF document text
    • https://lakerevuko.weebly.com/uploads/1/3/4/6/134654656/1344845.pdfIn PDF document text
    • https://kewivuzakokefi.weebly.com/uploads/1/3/0/7/130775129/5490925.pdfIn PDF document text
    • https://todilotifobaw.weebly.com/uploads/1/3/2/7/132712516/vofezinoziverasug.pdfIn PDF document text
    • http://xefawojuj.mygamesonline.org/boss_br-800_review.pdfIn PDF document text
    • http://fojukivijivik.medianewsonline.com/electrical_engineering_book_download.pdfIn PDF document text
    • http://midarujiwuvi.mygamesonline.org/vicks_humidifier_filter_walmart.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://59bb578d-b312-442a-858b-1a1a54b18a6c.filesusr.com/ugd/c79b1c_7108e384baef4c5fa966ba892fc6591e.pdf?index=trueIn PDF document text
    • https://12879e5c-81de-4786-8c60-abd434996022.filesusr.com/ugd/4cd51e_e5fe72504a3346ba8af159cf38d9a905.pdf?index=trueIn PDF document text
    • http://zugemanuzori.rf.gd/wukiruwevur.pdfIn PDF document text
    • https://507d1b22-ea03-4061-a262-f79425337ca2.filesusr.com/ugd/a374b9_78225dcf64b145059b1ffae6d961f1ce.pdf?index=trueIn PDF document text
    • http://napebapowaje.rf.gd/77783986384.pdfIn PDF document text
    • http://vibibedoxoxi.epizy.com/likamozipewulezibep.pdfIn PDF document text
    • https://0491f86b-060d-4f4a-be23-b0d01488777f.filesusr.com/ugd/faa7ef_04b7aeb4f942415b85773971a3ac030a.pdf?index=trueIn PDF document text
    • https://f495c71d-628d-4070-9a3d-b699cbb46ba4.filesusr.com/ugd/d99ef3_17fb5b01030f4e29b87b30862783da26.pdf?index=trueIn 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_off0000f2ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2AC 5624 bytes
SHA-256: 3592fa66e20268dd3078ccea9725d3bfb1d27c52372935987ad1a12dec2d9157
font_01_sfnt_off000105bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105BC 10696 bytes
SHA-256: 5019e97af4d50cd079e1e30b9be90d56a615692a0b5fb4f0dc59340d34104d2d