Malicious PDF — malware analysis report

Static analysis result for SHA-256 1eb576ae5dd04f54…

MALICIOUS

PDF

86.3 KB Created: 2021-06-08 09:50:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 65488b5be16290d7d691222021a12c43 SHA-1: 69b02b42ed11ae37493c2935e52ad6c598af5872 SHA-256: 1eb576ae5dd04f54f913f89a88461d76331a28eaa5786b2dcbfc4737526db8b1
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was identified as malicious by multiple heuristics and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, directing users to numerous external URLs, some of which are hosted on disposable domains. The primary purpose appears to be SEO manipulation or directing users to potentially harmful content, rather than a direct exploit within the PDF itself.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://cructi.ru/pbw?utm_term=how+to+spoof+pokemon+go+on+ios+14 PDF link annotation
    • https://fotovotujipibar.weebly.com/uploads/1/3/4/2/134267097/4174989.pdfIn PDF document text
    • https://bovefunovowuto.weebly.com/uploads/1/3/0/8/130873908/laganar.pdfIn PDF document text
    • https://koloxajemixe.weebly.com/uploads/1/3/1/4/131482821/riminupewute.pdfIn PDF document text
    • https://tabetigilazewa.weebly.com/uploads/1/3/5/3/135392987/6393822.pdfIn PDF document text
    • https://jaroxifapo.weebly.com/uploads/1/3/1/6/131636664/5869818.pdfIn PDF document text
    • https://jipaxebuperiw.weebly.com/uploads/1/3/4/7/134751602/jogasifolanotup-nikem-nadamoju-lalel.pdfIn PDF document text
    • https://fejuratomejavud.weebly.com/uploads/1/3/0/7/130776174/8549287.pdfIn PDF document text
    • https://mozesewopizudal.weebly.com/uploads/1/3/4/3/134363743/xuperu_bawixazagenika.pdfIn PDF document text
    • https://zibabesisem.weebly.com/uploads/1/3/4/6/134670176/rikexililuxinasofem.pdfIn PDF document text
    • https://rerofijujujedo.weebly.com/uploads/1/3/1/8/131872137/xopel.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://liwuvedesisu.pbworks.com/f/is_indian_yogurt_keto.pdfIn PDF document text
    • http://wepoline.pbworks.com/w/file/fetch/144449610/baleno_cvt_or_manual_which_is_better.pdfIn PDF document text
    • http://mifimoruzuwo.pbworks.com/w/file/fetch/144615975/xowisixiletitovuz.pdfIn PDF document text
    • http://giribuv.pbworks.com/w/file/fetch/144701808/jps_hebrew-english_tanakh.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f49ca1e4-640e-422f-b001-c7c68cae74c8/mackie_profx8v2_8-channel_professional_effects_mixer.pdfIn PDF document text
    • http://zorisomofi.pbworks.com/w/file/fetch/144710304/toxafusivibipodelofezu.pdfIn PDF document text
    • http://jaxonewu.pbworks.com/w/file/fetch/144824400/mortal_kombat_trilogy_n64_cheat_menu.pdfIn PDF document text
    • http://tavaretaz.pbworks.com/f/briggs_and_stratton_450_oil_capacity.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5349a708-5202-45e2-a3f6-0e1e36d61267/algebra_1_eoc_review_packet_georgia.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fd212cbc-6a6c-487d-8e99-44e441ad8e15/62845380097.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_off0001124b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1124B 5140 bytes
SHA-256: ac462ce031afecb4068443b0df2b0ea744cf9ebbfa997dab4e8f02bb3110c418
font_01_sfnt_off000123e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123E4 11712 bytes
SHA-256: 2940fb3e18380a19bbf4dcf9e99c1c7af65b723fd3cdd1f4460a03c29a0fff5e