Malicious PDF — malware analysis report

Static analysis result for SHA-256 29e7951775889c57…

MALICIOUS

PDF

81.7 KB Created: 2021-03-12 16:41:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 9477c391bab7cb8cc8a1a7cb43ff72fb SHA-1: ef203089e06e9ff368b44a25cf816c2436926e9e SHA-256: 29e7951775889c5700971ca54c57596a7c1c8f8024417aaac0807c90b248c699
244 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, exhibiting characteristics of a link farm. It contains numerous embedded URLs pointing to external PDF documents, many hosted on disposable domains, suggesting an attempt to manipulate search engine results or distribute further malicious content. The presence of a redirector link further supports malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/123?utm_term=kakashi+anbu+mask+template In PDF document text
    • https://cdn.sqhk.co/datimemovuko/3Nlku59/sky_sports_football_champions_league_fixtures.pdfIn PDF document text
    • http://xalapuzim.sportsontheweb.net/libro_budismo_zen_y_psicoanalisis.pdfIn PDF document text
    • https://vekoduxiboba.weebly.com/uploads/1/3/1/3/131398498/2738609.pdfIn PDF document text
    • https://topudamix.weebly.com/uploads/1/3/4/5/134581811/5974563.pdfIn PDF document text
    • http://pojibuvuj.mygamesonline.org/ap_land_registration_form_32a.pdfIn PDF document text
    • http://woxuruko.medianewsonline.com/nunelanejevevalikesigub.pdfIn PDF document text
    • https://putukaxuke.weebly.com/uploads/1/3/1/4/131437363/91b57043e27322.pdfIn PDF document text
    • http://xelasurugopu.mywebcommunity.org/dedirelodejuvanugamer.pdfIn PDF document text
    • https://guvepilafofifiv.weebly.com/uploads/1/3/4/6/134682232/wemuguva.pdfIn PDF document text
    • https://bobusenig.weebly.com/uploads/1/3/4/8/134866704/10b9c26f.pdfIn PDF document text
    • http://waferaboteb.mypressonline.com/britax_marathon_clicktight_forward_facing_height_limit.pdfIn PDF document text
    • https://cdn.sqhk.co/nukusigemug/drYiogi/ping_pong_masters_mod_apk_1._1._44.pdfIn PDF document text
    • https://cdn.sqhk.co/lixabanitav/8idgfFc/spina_bifida_symptoms_in_utero.pdfIn PDF document text
    • https://tizevilujiv.weebly.com/uploads/1/3/1/4/131406709/1413891.pdfIn PDF document text
    • https://vugopese.weebly.com/uploads/1/3/0/7/130739154/xokenel-wevovoxobuke-gemomureporoxa.pdfIn PDF document text
    • https://zibaxewax.weebly.com/uploads/1/3/4/6/134699960/visij_zasomamujoxujoj_tipuwopizu.pdfIn PDF document text
    • http://wogivodugakovek.mygamesonline.org/facial_expression_pictures.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vewawisu.onlinewebshop.net/botixobudeju.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7baac113-c7e1-4910-8bc2-1116a0c5f90c/buenos_dias_princesa_pelicula_completa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d94c913e-07e0-4bda-9d81-306995eae785/where_to_buy_a_good_metal_detector.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6ad019c0-ccce-4547-a5e8-d7cb21348d35/how_to_connect_a_canon_wireless_printer_without_the_cd.pdfIn PDF document text
    • https://youtu.be/bCUfvYBsOmMIn 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eb4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB4D 3052 bytes
SHA-256: 54ec05e1d3280b7ea717108ec74743ac7fbc8d5ac24b7f3c4674270a0957a8c1
font_01_sfnt_off0000f62d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF62D 5136 bytes
SHA-256: a8a4ae01700075afe0638385fafeeabccaf843d9d2ae574db9ab6c60d57fe943
font_02_sfnt_off00010775.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10775 2956 bytes
SHA-256: e60eeafc5d0082bc25d9d8c0d93ad8d91ea00c38875f95346dd1996252d39050
font_03_sfnt_off000113bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113BC 11104 bytes
SHA-256: f47a64752902a73344d546a3f532a4c24d55d89f8eb8eb8e82c0efa2142fc791