Malicious PDF — malware analysis report

Static analysis result for SHA-256 672fc148c4268284…

MALICIOUS

PDF

65.8 KB Created: 2021-06-04 18:51:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 50984e4691a7eb2ae84c8047c1b7a0ab SHA-1: da87babc2d0fcff77406a00a58297829bbfb8f68 SHA-256: 672fc148c4268284b7aeeba29cb9339f8ebd08fe70d12e22c41b2f7cab89954a
126 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9998

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://philabc.ru/pbw?utm_term=dgs+temel+kavramlar+test+%25C3%25A7%25C3%25B6z PDF link annotation
    • https://nododekevage.weebly.com/uploads/1/3/4/7/134733794/lazuwapetazig.pdfIn PDF document text
    • https://jodavetofa.weebly.com/uploads/1/3/1/4/131438562/4924906.pdfIn PDF document text
    • https://tusixifowidafoj.weebly.com/uploads/1/3/1/4/131437116/5c7994f9b54.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460241/normal_5fc812ddc82ef.pdfIn PDF document text
    • https://bumilumijoxaxuv.weebly.com/uploads/1/3/4/4/134497753/vodirux-kakovugoru.pdfIn PDF document text
    • https://telarosiz.weebly.com/uploads/1/3/5/3/135318094/651778.pdfIn PDF document text
    • https://norogogobizifuk.weebly.com/uploads/1/3/2/8/132816096/sijiva-mapizolateti-ziseg-fadalokovuxi.pdfIn PDF document text
    • https://duziduwavi.weebly.com/uploads/1/3/1/0/131070207/jazav_jipowolalinen.pdfIn PDF document text
    • https://rabugotekinevod.weebly.com/uploads/1/3/1/8/131871666/41d495bf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392668/normal_60316b7f719f6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501998/normal_606c30fc3c1a9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417426/normal_601bf934ed345.pdfIn PDF document text
    • https://karifizamazo.weebly.com/uploads/1/3/1/3/131383674/931501307f25711.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vawijoj.pbworks.com/w/file/fetch/144563937/muluz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f065bc06-319d-4eda-b7b4-5bdbe9f4ab7b/casio_databank_150_battery.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/656d0973-824b-4630-ae0d-7fb23b015450/nukugebelaxozi.pdfIn PDF document text
    • http://zusemivak.pbworks.com/w/file/fetch/144595497/the_revenge_of_seven_full_book_download.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_off0000c137.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC137 5496 bytes
SHA-256: 00baaa74253b41f074b64eae969841603f947b11b7092202e9ba87cf24a5aad6
font_01_sfnt_off0000d3aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3AA 11440 bytes
SHA-256: 0968f3be5477999490f48da94aeb4feddfc10298bc419ec3d1788c4f2be69f10

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