PDF malware analysis — malicious · aa60f8125606f227

MALICIOUS

PDF

82.2 KB Created: 2021-03-08 19:40:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23

MD5: cb39696821a85e7581dc3595b23beb40 SHA-1: 89eeef3ecf5bbaf6c05c0c8f553db1acbdd47fff SHA-256: aa60f8125606f22764991e967cbe4c405e55e2bff9fa5c77a52cfc189b89de0f

126 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and 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 0.9967

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://xajibur.ru/wix?keyword=true+skate+ios+apk+full PDF link annotation
- https://static.s123-cdn-static.com/uploads/4421614/normal_60011cb713761.pdfIn PDF document text
- http://mrshadow.net/ser_estar_worksheet_answers_spanish4teachersqc6je.pdfIn PDF document text
- http://thrivewebs.com/vikings_panthers_game_scoreol3lg.pdfIn PDF document text
- https://lokulubebu.weebly.com/uploads/1/3/1/8/131856352/govaxuduz.pdfIn PDF document text
- https://texifafotolatip.weebly.com/uploads/1/3/4/7/134764930/2772647.pdfIn PDF document text
- https://somotudodij.weebly.com/uploads/1/3/4/6/134699902/2187112.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4454054/normal_6002e84cbae0c.pdfIn PDF document text
- http://jsexj.fun/83508600169ga7nf.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4485448/normal_6043675a83d45.pdfIn PDF document text
- https://fogojokiverowur.weebly.com/uploads/1/3/0/9/130969702/3524877.pdfIn PDF document text
- https://vubeluzuge.weebly.com/uploads/1/3/4/3/134357782/fuxijatazigaxi.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4457868/normal_5fe7725123cd5.pdfIn PDF document text
- https://tirepululavapiw.weebly.com/uploads/1/3/4/5/134576363/tagejezobo-kasidikikazixo-jafipitexidab-dafed.pdfIn PDF document text
- https://vipeketiduwe.weebly.com/uploads/1/3/1/6/131636725/xuxelajim-kinuzixef.pdfIn PDF document text
- https://wupexuzirat.weebly.com/uploads/1/3/5/3/135338028/7872362.pdfIn PDF document text
- http://smartcoin.design/421509426884oh2w.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4393925/normal_5fd634052296d.pdfIn PDF document text
- https://pukakiliratof.weebly.com/uploads/1/3/4/7/134768090/bimezaxovuzifovet.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- https://s3.amazonaws.com/zemunomipazikez/arena_sava_2_android_oyun_club.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/3316829f-bbd4-47c1-8903-3f53ce9a5836/cien_aos_de_soledad_traductor_ingles.pdfIn PDF document text
- https://s3.amazonaws.com/jexijer/cnet_internet_manager.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/825ef80e-08d1-4cbb-9a44-550a830b849c/how_to_get_viper_5706v_out_of_valet_mode.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/8adf4d53-2c50-497f-96ae-4493070c25e8/72526524999.pdfIn PDF document text
- https://s3.amazonaws.com/xeruxaxer/nubomukagipe.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/3764382d-cbd5-42d1-ac9a-cee4385a24fc/weledo.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/44a6749d-caae-4f2f-816f-33fffdefe466/59767105744.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.

Filename	Kind	Source	Size
`font_00_sfnt_off0001066f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1066F	4908 bytes
SHA-256: `f23670c8c92904698dcf6d081e88631800aa0240ce2978974a82b6d4c0566018`
`font_01_sfnt_off0001172f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1172F	10792 bytes
SHA-256: `d0263f7154102c89e863ce0afda58888c09bcfb1c725ff43930f725f6651ccf9`

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