Malicious PDF — malware analysis report

Static analysis result for SHA-256 43adb26f996b5e67…

MALICIOUS

PDF

75.0 KB Created: 2021-03-13 22:12:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 9e30849c6ec73e6798cb8e756c8b2a58 SHA-1: 6f0e5306c4ce5745aee387fb0cc8ff25250d91db SHA-256: 43adb26f996b5e6741a0bc0d582577d65b39e18951a5938e38362f7a348ed6f6
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

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 0.8784

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
  • PDF differential parser failed info PDF_DIFFERENTIAL_PARSE_FAILED
    The cross-check parser (pdfminer.six) failed on this file: PDF differential parser failed: PDFSyntaxError. Static heuristics still ran and any of their findings above are valid; only the differential cross-check signal is missing.
  • 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://pelibifir.ru/award?keyword=apendisitis+perforasi+pdf PDF link annotation
    • https://jitifawe.weebly.com/uploads/1/3/5/3/135327084/famuvudexefowup_lofixulu_ropetoti_xazovuzo.pdfIn PDF document text
    • https://digaporabanezaf.weebly.com/uploads/1/3/4/6/134689005/moxeroropi.pdfIn PDF document text
    • https://telogedibosujo.weebly.com/uploads/1/3/1/4/131438044/2628822.pdfIn PDF document text
    • https://tumuzisokume.weebly.com/uploads/1/3/5/3/135351536/5f683a0f80.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367625/normal_601a39484410f.pdfIn PDF document text
    • https://mojoranazo.weebly.com/uploads/1/3/4/4/134403481/ad236d6b54c632.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388608/normal_5ffea78af19d1.pdfIn PDF document text
    • https://wivutukezed.weebly.com/uploads/1/3/1/4/131438473/wobukakawumepodipa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4411916/normal_60011f6882694.pdfIn PDF document text
    • https://jekotufuwin.weebly.com/uploads/1/3/1/4/131406020/9964085.pdfIn PDF document text
    • https://murudogukezopo.weebly.com/uploads/1/3/4/3/134320821/luvukalovopuziburu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368265/normal_5fc938690f337.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376854/normal_600dd9a47b555.pdfIn PDF document text
    • https://zelekunidos.weebly.com/uploads/1/3/2/6/132682808/furumilabora.pdfIn PDF document text
    • https://gopogaxewose.weebly.com/uploads/1/3/4/0/134013169/da6504.pdfIn PDF document text
    • https://kuwuxezito.weebly.com/uploads/1/3/6/0/136090431/nafupul_rerufu_sizatenerikif.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425209/normal_6025c06087917.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424696/normal_600c73fb2b672.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366018/normal_601454715ba4a.pdfIn PDF document text
    • https://bubosetew.weebly.com/uploads/1/3/4/5/134515161/bukijejigiwelaj.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/9c6c7ec9-47b7-4577-8948-e891e59fc1c2/what_was_progressive_education.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f8b3303c-5160-4a8c-b4ca-1a444bdf683e/rancilio_silvia_espresso_machine_instruction_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c92e89b4-d9de-40e4-9320-df18e4928347/52065124593.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4226d3a1-5529-4df1-a833-3403c6739446/hp_4630_printer_wireless_setup.pdfIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f326.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF326 4992 bytes
SHA-256: 1f653e4168847796b3e7f6e56ecfbbf1e318a10172c034771b45bc39158b9bdc
font_01_sfnt_off0001042d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1042D 10624 bytes
SHA-256: 72c58d8f0c61404b2d4b67e403487a6ded3eb5d9a33c8d026db8c745fda24e38

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