Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b0b9f89681bbda1…

MALICIOUS

PDF

69.3 KB Created: 2021-02-02 11:07:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 0bd197c81397e62bc220a14e92359565 SHA-1: 9e4b90f71ec1f8e1f99b31a5c21579339aafc4c1 SHA-256: 2b0b9f89681bbda1f17a693a3314b8b4f0a645b9153bab4163478782cdbba88e
244 Risk Score

Malware Insights

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

The PDF was flagged by multiple heuristics as malicious, including a link to known malicious redirector infrastructure and a large farm of links to external PDFs hosted on disposable domains. The ML classifier also strongly indicated maliciousness. The embedded URLs and link farm suggest the primary purpose is to redirect users to potentially harmful content or download further stages of malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • 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.
  • 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.
  • 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://yafferge.ru/aws?utm_term=beep+beep+notification+sound In PDF document text
    • http://pixell.store/euro_truck_driving_simulator_2020_mod_apk8tfau.pdfIn PDF document text
    • https://gonuvogizup.weebly.com/uploads/1/3/1/8/131857562/fanexakofa.pdfIn PDF document text
    • https://zugixipenelir.weebly.com/uploads/1/3/4/5/134591811/5836449.pdfIn PDF document text
    • https://gitufigekuxos.weebly.com/uploads/1/3/4/6/134634758/02bb4ea.pdfIn PDF document text
    • https://cdn.sqhk.co/roretuduva/hgFhblp/64766611526.pdfIn PDF document text
    • https://ziresaro.weebly.com/uploads/1/3/4/5/134509830/mavun-zirukanudovabef.pdfIn PDF document text
    • https://lifalaril.weebly.com/uploads/1/3/4/8/134883644/2830501.pdfIn PDF document text
    • https://cdn.sqhk.co/nutanujel/eIzgggi/farm_linen_cloth.pdfIn PDF document text
    • https://cdn.sqhk.co/zonakagud/R0ifk4a/bedoyecta_tri_benefits.pdfIn PDF document text
    • https://cdn.sqhk.co/kenipafitu/jgideNa/top_box_office_movies_this_week.pdfIn PDF document text
    • https://tibijipobarak.weebly.com/uploads/1/3/4/4/134493900/videsodiwilane_niwidezata_ripamigurefugob_xewako.pdfIn PDF document text
    • https://lulofaki.weebly.com/uploads/1/3/1/4/131453598/393766332232f9.pdfIn PDF document text
    • https://cdn.sqhk.co/nopawuwam/LjdtIFp/50601004103.pdfIn PDF document text
    • https://rifuxegu.weebly.com/uploads/1/3/4/5/134525143/jofujapopurus.pdfIn PDF document text
    • http://dhl-order.info/aio_launcher_unlocked_apkqmkqi.pdfIn PDF document text
    • https://cdn.sqhk.co/gisatajofo/wNEDha0/nizebunogidamajunamad.pdfIn PDF document text
    • https://cdn.sqhk.co/letaziseb/VmK5Jjg/11x11_soccer_club_manager_mod_apk_download.pdfIn PDF document text
    • http://firstdoctor.xyz/ikea_kitchen_cabinets_doorsy26wj.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vewajelawukos.rf.gd/wiwojekixifazotakof.pdfIn PDF document text
    • http://lojizaruxaz.rf.gd/wiraburowe.pdfIn PDF document text
    • http://roragopijejem.epizy.com/24299660011.pdfIn PDF document text
    • http://ramasewo.epizy.com/guxoxexepi.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_off0000d2c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2C2 5208 bytes
SHA-256: 568403ec8e65f84a83d31bb00257c92d6a0637194518d756e98f287bf0428f57
font_01_sfnt_off0000e48a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE48A 10176 bytes
SHA-256: 4a8495e35ca1ce5a4a31f91ae851b131e099f844bb0a8e81396fa01d44eddbf8