Malicious PDF — malware analysis report

Static analysis result for SHA-256 14ef0f59ea7f0b20…

MALICIOUS

PDF

82.0 KB Created: 2021-03-18 16:19:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 4d84934e679f6abb32390ded376e7573 SHA-1: ea61b76cfe761a7f409deee3158e2c2a4d61d300 SHA-256: 14ef0f59ea7f0b20403157f8bf290311757e94f43cdfb4c8f45736d11d9097aa
126 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, with at least one pointing to a domain associated with link farming and disposable hosting, suggesting a phishing or malware distribution scheme. The presence of external URIs and the overall structure point towards an attempt to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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 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://ponafet.ru/award?keyword=autodesk+maya+2020+basics+guide+pdf+free+download PDF link annotation
    • http://disuxixepere.22web.org/dimowajulisukaruni.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390638/normal_604b0b32cc9f3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375080/normal_5fe2b1e62ecfe.pdfIn PDF document text
    • http://devigebogubiret.getenjoyment.net/88024765270.pdfIn PDF document text
    • https://jumitugiputetiv.weebly.com/uploads/1/3/5/3/135313018/84e95300f776.pdfIn PDF document text
    • https://runeburagaxe.weebly.com/uploads/1/3/4/6/134699488/boxuvusuvako-jofibiwoduzub.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495973/normal_602b5dd409585.pdfIn PDF document text
    • http://patamekuzon.iblogger.org/income_guidelines_for_food_assistance_in_iowa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485163/normal_6015fc5ce36d2.pdfIn PDF document text
    • http://birixuxewazotaz.mywebcommunity.org/61231243970.pdfIn PDF document text
    • http://xisalokowifob.22web.org/tatikulivegiped.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448347/normal_5fe66aeeb4637.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495849/normal_5ff363e778537.pdfIn PDF document text
    • https://buralekareze.weebly.com/uploads/1/3/4/3/134326789/mofigiri.pdfIn PDF document text
    • http://medebupima.sportsontheweb.net/penazuvozorejivejoma.pdfIn PDF document text
    • https://guxisawupejova.weebly.com/uploads/1/3/0/8/130814058/8313291.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371812/normal_601eae1c39cc4.pdfIn PDF document text
    • https://vameduxa.weebly.com/uploads/1/3/4/6/134664578/3b2f6aa.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xowobovu.myartsonline.com/hp_5550_printer_driver_download_windows_7.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d08e38f3-b25b-41bc-9a8e-8ada95c375d9/amano_pix_55_time_clock_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1c202124-9d83-4aa7-813f-8ebfcf381ad6/what_are_crossover_cables.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/43434496-7aba-48d1-990c-adc30f64f066/82210468144.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_off00010153.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10153 6136 bytes
SHA-256: b6dffd71962d9e069b896ad163316abc116aaaeb28061fb15d17979dd7b2ef5a
font_01_sfnt_off00011636.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11636 10476 bytes
SHA-256: cf8fdd5c56fcf6f56fc4e293ad04c33d1c7942b97d0bc08b9cd61c28db407166