Malicious PDF — malware analysis report

Static analysis result for SHA-256 979602281e7b6e49…

MALICIOUS

PDF

81.4 KB Created: 2021-04-25 01:44:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: d7aefbee319cc00a0e49f78bc6836055 SHA-1: 4119346bfcb49f6acaed76ff501f2b33d85ed4f9 SHA-256: 979602281e7b6e4915cb7e8875cd79f905a9994950eed87488aac98578996282
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 5

  • 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://gimoguvi.ru/strik?utm_term=honda+generator+eu3000is+carburetor+cleaning PDF link annotation
    • https://xogovowumo.weebly.com/uploads/1/3/0/7/130738979/9563992.pdfIn PDF document text
    • https://xikobidena.weebly.com/uploads/1/3/6/0/136097244/xebotufelep.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365539/normal_6022c63c966ed.pdfIn PDF document text
    • https://veledagovivavav.weebly.com/uploads/1/3/2/6/132681602/febogogaxazi-jerexufanuluf-werikosokikozi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4500897/normal_5fdd1709be660.pdfIn PDF document text
    • http://kutagugiponapa.22web.org/motofumukisamipesidote.pdfIn PDF document text
    • http://vugijow.iblogger.org/hp_desktop_pc_bios_reset.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4468819/normal_602e39399fe28.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417645/normal_6024a4c11f4dc.pdfIn PDF document text
    • https://lefafikof.weebly.com/uploads/1/3/0/9/130969708/xagokuxojavev.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/bc49468d-4712-4203-ab28-03a7b37d69c7/5000_year_leap_free.pdfIn PDF document text
    • https://5e0c4d4d-41f9-428c-9564-b93e7cff6769.filesusr.com/ugd/510691_ea7400a71eb048bdb340bd1d5bf62c79.pdf?index=trueIn PDF document text
    • http://bupozefi.epizy.com/idsa_diabetic_foot_infection_guidelines_2017.pdfIn PDF document text
    • https://95049c82-e412-4913-a0b0-e03e83d5170a.filesusr.com/ugd/127d6e_4be7f83625364f45948026d758e11707.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/85ed2c32-2b44-4bba-87e4-ac3d60b03ce0/80678208349.pdfIn PDF document text
    • http://nawopadawejiw.epizy.com/cancer_de_pancreas_medigraphic.pdfIn PDF document text
    • http://nokizotef.rf.gd/28195740506.pdfIn PDF document text
    • http://kelawezup.rf.gd/mofuxikupaba.pdfIn PDF document text
    • https://070488ba-e3d9-4c74-834b-445551f5513c.filesusr.com/ugd/fb83f1_d37b1b976dc64acb9e45ecd945073887.pdf?index=trueIn PDF document text
    • https://91ca87c2-c493-4616-adaa-fbcec45394e1.filesusr.com/ugd/6116da_a9b43184b7274c3e8a36c0ff66c07381.pdf?index=trueIn PDF document text
    • https://0f7a2101-273c-4f7f-b1fd-079d1ad923c1.filesusr.com/ugd/a7ea6f_67c1783ea93d48e9b0abc53c3f65ea58.pdf?index=trueIn PDF document text
    • http://tavaleke.epizy.com/how_to_connect_victsing_bluetooth_speaker.pdfIn PDF document text
    • http://latevafizatum.rf.gd/amana_radarange_over_the_range_microwave.pdfIn PDF document text
    • http://majilutiwuxas.rf.gd/cydia_app_free.pdfIn PDF document text
    • http://paborijobo.epizy.com/rugamifurarinuxezejad.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_off0000ff89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF89 5516 bytes
SHA-256: 215c81cd61d0bf13b47532ad2e57c6b4a74802197aeabec706faa82186dbce69
font_01_sfnt_off0001124a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1124A 11052 bytes
SHA-256: 68e48e693f365a20688867f7edb982308d351e7e990eadedbf5078f748fe062e