Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce8028ebbdc54502…

MALICIOUS

PDF

76.1 KB Created: 2021-03-17 06:08:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: a27d6a9e66d08937d5b043c07462dcf0 SHA-1: 98487a9cb9faea4b228b2f61696e306e5d9aede5 SHA-256: ce8028ebbdc545028a5b130dd5bdbff311bb47dedb0f2bd4455cbc5b564328d7
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 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://golowaki.ru/123?utm_term=video+star+ios+app+for+android PDF link annotation
    • http://fuviguz.22web.org/8804663837.pdfIn PDF document text
    • http://figironeme.22web.org/21757879392.pdfIn PDF document text
    • https://ribavazo.weebly.com/uploads/1/3/5/3/135322422/fetevoziwogenubava.pdfIn PDF document text
    • http://mosebuzixat.mywebcommunity.org/75203484649.pdfIn PDF document text
    • http://wifunagidoli.mypressonline.com/81803989098.pdfIn PDF document text
    • https://kepiloxuxamife.weebly.com/uploads/1/3/0/7/130740378/pavibude_kixotiv_pimoluwuv_rasonuji.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462374/normal_60257c092d8c4.pdfIn PDF document text
    • https://vezudarelewik.weebly.com/uploads/1/3/1/4/131482962/sugijivugumam.pdfIn PDF document text
    • http://zuwifipenabed.medianewsonline.com/15749482973.pdfIn PDF document text
    • http://tumibejum.iblogger.org/netflix_expired_meaning.pdfIn PDF document text
    • https://vinetiwufo.weebly.com/uploads/1/3/5/3/135305890/bobisetejunaz-mowomelur.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444357/normal_60345b14443fd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471683/normal_600ce3bc3c5db.pdfIn PDF document text
    • https://polurivi.weebly.com/uploads/1/3/4/9/134904590/9266ae0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446170/normal_5fc86ae82c794.pdfIn PDF document text
    • https://gamajebijapam.weebly.com/uploads/1/3/1/8/131856653/3365536.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/0e070e67-9005-4dc8-a120-8a875c94b25f/83870680428.pdfIn PDF document text
    • http://sisawujeza.rf.gd/96895443755.pdfIn PDF document text
    • http://kugukokoner.myartsonline.com/character_description_of_the_rainbow_fish.pdfIn PDF document text
    • http://gafodix.myartsonline.com/74080441451.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a00ba850-ec2e-4f5e-81c7-0709ed759b32/60598378630.pdfIn PDF document text
    • http://nirutavikuda.epizy.com/metformin_hydrochloride_sr_and_glimepiride_tablets.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_off0000ee93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE93 4968 bytes
SHA-256: c783a5036a4f5746400639f427fb2cb164a9708d3983b1825b952dc1f1ca522d
font_01_sfnt_off0000ff8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF8D 10388 bytes
SHA-256: a99dc30c25cde8511c32fdb79684a119dc1f52eef34a6159e638cf71a5c9a036

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