Malicious PDF — malware analysis report

Static analysis result for SHA-256 76f9ee5f6bd8cb6c…

MALICIOUS

PDF

85.9 KB Created: 2021-03-20 04:46:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: d7e2be109a5efa26211182f4ae003d93 SHA-1: 78993b2617fdf07cac885d7351141e6f505fbf4b SHA-256: 76f9ee5f6bd8cb6c11081703a0379bcb41528a02ac88a29758a88d6f6fec8836
126 Risk Score

Malware Insights

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

The PDF contains numerous external URIs, with a significant portion hosted on disposable domains and employing UTM parameters, indicating a link farm designed to obscure the ultimate destination. The ML classifier and ClamAV detection strongly suggest malicious intent, specifically identified as phishing or trojan activity. While no scripts were directly extracted, the PDF structure and heuristic firings point towards a malicious document likely used to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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 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://botokaw.ru/strik?utm_term=how+to+add+music+in+bandlab PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4465688/normal_602f5b81afdee.pdfIn PDF document text
    • http://vuxiparami.22web.org/accidents_reported_today_in_palmdale_ca.pdfIn PDF document text
    • http://guvinesusavilo.iblogger.org/12508891252.pdfIn PDF document text
    • https://werijumifisa.weebly.com/uploads/1/3/4/7/134729585/giwofanox.pdfIn PDF document text
    • http://xufadaxedi.22web.org/sample_persuasive_paragraph.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483589/normal_600bd0519ecbd.pdfIn PDF document text
    • http://dasaburaxad.22web.org/demon_slayer_anime_episode_guide.pdfIn PDF document text
    • https://kalujobad.weebly.com/uploads/1/3/4/3/134390175/dutumumom.pdfIn PDF document text
    • https://nemelodanunoju.weebly.com/uploads/1/3/0/8/130874480/mugiwofato.pdfIn PDF document text
    • https://jabudebixeref.weebly.com/uploads/1/3/4/3/134398441/1273744.pdfIn PDF document text
    • https://daliroxemonove.weebly.com/uploads/1/3/0/7/130775241/tapuxenuk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390641/normal_602efeb8bf935.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/ac310cec-b339-48ea-a616-79ee2f7cf677/kenmore_elite_oasis_he_washer_error_code_sd.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c159cba4-3d30-49a2-9990-510f4be4c956/nuralox.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ddbae5ce-cf56-41f9-970d-747f171398d2/what_color_are_springtraps_eyes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e3e775ea-a33a-4560-a23a-0eb4cc892dbf/can_you_call_your_baby_god.pdfIn PDF document text
    • http://totefejat.epizy.com/verizon_quantum_gateway_router_login.pdfIn PDF document text
    • http://pamiwumewamem.epizy.com/britten_norman_islander_poh.pdfIn PDF document text
    • https://45b0b119-5f8c-43e7-b437-4e12d17c1c81.filesusr.com/ugd/3826db_6e5beb4f67764ac1b4090497674d7933.pdf?index=trueIn PDF document text
    • http://mapupove.rf.gd/pretty_little_liars_season_5_episode_26_dailymotion.pdfIn PDF document text
    • http://ronodinagidos.rf.gd/7134436441.pdfIn PDF document text
    • https://425e2ee7-996f-4c6d-a593-b44a2a39b733.filesusr.com/ugd/bb05c1_37681eb89e394b17a7cac0780459995d.pdf?index=trueIn PDF document text
    • http://lozurituga.rf.gd/53279385949.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eec0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEC0 5184 bytes
SHA-256: dd9984d770e2cb5a4dc5ddd78f3c99b3e1a1127017b3aa036cf922c518f7506e
font_01_sfnt_off0001005a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1005A 4484 bytes
SHA-256: ab08e9e14c7e8fdef23f88eeb2b89995617effa2668a2a6da3cf0a97defc4921
font_02_sfnt_off00010c98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C98 11380 bytes
SHA-256: 6170cc736d405af9707bcf37544a180bd4c72353f393272cf8e79fdacacf109b
font_03_sfnt_off000133c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x133C9 16380 bytes
SHA-256: 9c71aaea62549e89be2b80026e8552e529abc9849e27d4ac1176ef2fe88b9bd5