Malicious PDF — malware analysis report

Static analysis result for SHA-256 252e6a6c9c8c161b…

MALICIOUS

PDF

80.0 KB Created: 2021-03-09 20:48:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 96fe2b688705b3dd777c2f523c9930ca SHA-1: 5c19359f9225710192347b99884cbcd8232007d7 SHA-256: 252e6a6c9c8c161b374ac7fd242bc7a4ae7c1de7df1bcee4113fc0beb74adabe
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to disposable hosting, indicating a link farm or SEO manipulation attempt. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and link farm behavior are indicative of techniques used to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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
  • 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://maypoin.ru/123?utm_term=cuddl+duds+fleece+sheets+twin+xl PDF link annotation
    • https://povebosi.weebly.com/uploads/1/3/5/3/135346093/novoporulododuj.pdfIn PDF document text
    • https://pusurezifokuni.weebly.com/uploads/1/3/4/3/134317864/8988245.pdfIn PDF document text
    • https://lolusegixasuvar.weebly.com/uploads/1/3/4/7/134770702/3669946.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461481/normal_5fd1cb2d3dd20.pdfIn PDF document text
    • http://dupuladusudired.mypressonline.com/45342086079.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4376357/normal_5ff474f182240.pdfIn PDF document text
    • http://kujunat.medianewsonline.com/avent_bottle_sterilizer_instructions_how_much_water.pdfIn PDF document text
    • http://feludekinopotas.scienceontheweb.net/xopikisela.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486363/normal_602a7dbbb00ac.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480876/normal_601a632b5af0a.pdfIn PDF document text
    • http://radogomi.mygamesonline.org/jesamuzurugujemapujunol.pdfIn PDF document text
    • http://fibutogu.mywebcommunity.org/baby_milestones_3_months_nhs.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://rugiwixet.epizy.com/88082880466.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d085f270-aea7-4849-822f-537da7b08516/viwulobi.pdfIn PDF document text
    • https://c78267de-509c-4cb0-9394-6b21b7876e04.filesusr.com/ugd/290ce3_ebd49abdf36c4985aaf3cb6c039e76aa.pdf?index=trueIn PDF document text
    • http://lawazujazigefon.epizy.com/85214307371.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c604f4f1-f80a-463f-8e68-ce42dc7d7691/calories_in_el_pollo_loco_chicken_bowl.pdfIn PDF document text
    • https://a7da3e60-63c8-46c1-a846-eab7df628ed2.filesusr.com/ugd/bba345_dbdc3aa7e6494705b42840c880fc7b84.pdf?index=trueIn PDF document text
    • http://ruvedinaz.rf.gd/usb_otg_ethernet_adapter_android.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/11972ae1-128a-44a4-a907-9d96a188b76b/what_does_it_mean_service_advancetrac.pdfIn PDF document text
    • https://5c2cca0d-3a4e-48b0-93bf-8ac6c0c026cb.filesusr.com/ugd/271e65_eb6c2bde11ab44ab92db88e4fd881d0b.pdf?index=trueIn PDF document text
    • https://dacf5b84-f80e-4bd8-bb7f-22aad20a1cd8.filesusr.com/ugd/285be4_f79bbd0ae4134551ac2ea8be375cc46c.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/b01067d7-4f48-4062-85ef-21f09aff1554/95788242140.pdfIn PDF document text
    • http://tubagawidi.epizy.com/html_tags_examples.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ec6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC6C 4760 bytes
SHA-256: 7d2161bee6d34610c9b2cd80b527206c48d497ebb3f0a91a3aaa9ba7b0ee8383
font_01_sfnt_off0000fca9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCA9 10956 bytes
SHA-256: 70694e90cdc6ed33091ef85b399887670e10047b387373058853f5a663d8f7f4
font_02_sfnt_off00012222.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12222 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

Open this report in the interactive analyzer, or submit your own file for analysis.