Malicious PDF — malware analysis report

Static analysis result for SHA-256 e044fbfa3c21e9ac…

MALICIOUS

PDF

79.7 KB Created: 2021-03-12 12:04:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 915b63ba5ed4bf89b666cfe7c2903499 SHA-1: 2c77fee67f1b8cd94ec631680bc860f73587fb28 SHA-256: e044fbfa3c21e9acb5f49c41342c1dff557280d99a5532d54050b4127612d449
186 Risk Score
Tags
free-cdn-ebook-manual-lure

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 domains, indicating a link farm or SEO manipulation scheme. ClamAV and ML heuristics identify it as a phishing or malicious PDF. While no scripts were explicitly extracted, the PDF structure and external links suggest it's designed to redirect users to potentially harmful content, possibly involving a phishing lure or malware download.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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/wix?keyword=speed+practice+problems+worksheet+answers PDF link annotation
    • https://musonilemif.weebly.com/uploads/1/3/4/7/134752032/mawopefate-repado-magifubetega-sirejobuvazegig.pdfIn PDF document text
    • https://xawavefite.weebly.com/uploads/1/3/4/6/134667803/7902511.pdfIn PDF document text
    • http://fodamibokaf.66ghz.com/bulleting_in_excel_sheet.pdfIn PDF document text
    • http://jezugelevafebir.22web.org/speaking_english_books.pdfIn PDF document text
    • https://kugixixubeleji.weebly.com/uploads/1/3/4/3/134324677/6246797.pdfIn PDF document text
    • https://bimifubonag.weebly.com/uploads/1/3/4/8/134881536/e5f5486b3c6.pdfIn PDF document text
    • http://kexisugotiro.22web.org/how_hard_is_the_nasm_personal_trainer_exam.pdfIn PDF document text
    • https://gabejopow.weebly.com/uploads/1/3/4/5/134597712/3722125.pdfIn PDF document text
    • https://joweralifaj.weebly.com/uploads/1/3/4/3/134350132/dusozowojoguxafax.pdfIn PDF document text
    • https://tibomomaludo.weebly.com/uploads/1/3/0/9/130969572/fibolafesogo.pdfIn PDF document text
    • https://mumizovis.weebly.com/uploads/1/3/4/3/134350635/1570356.pdfIn PDF document text
    • http://xomapometafa.iblogger.org/pigobopiwinoxumi.pdfIn PDF document text
    • https://jozufibajas.weebly.com/uploads/1/3/0/9/130969385/zitesafilede-xinapamoxiwu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wewabegig.rf.gd/lekemexafe.pdfIn PDF document text
    • https://e8c82854-2a0b-4c0f-82de-bac600ce06e6.filesusr.com/ugd/d017d5_55af49be77a7455b92caa7f8502f152c.pdf?index=trueIn PDF document text
    • http://wobagufiri.rf.gd/insyde_bios_update.pdfIn PDF document text
    • http://zisoramemib.rf.gd/chloroform_spray_buy_in_delhi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6fb98315-58c7-4e51-9753-eb0cbf97a6a4/jizuduripizisimegota.pdfIn PDF document text
    • https://9d1e48ad-bcd7-4831-9b7b-7108443a63b6.filesusr.com/ugd/136d07_4175a560baeb410cad751984f3ebe39d.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/26101667-c570-423f-8bec-72ed6a9df08b/which_best_compares_the_themes_of_oedipus_rex.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_off0000faa4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAA4 5712 bytes
SHA-256: 46c20b472ef91028fce07caa9e06d4ff2281c2dcf3d2d7821826fb68615b6d23
font_01_sfnt_off00010df1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DF1 10492 bytes
SHA-256: 4bed427335b1fc0951b9dce5023dae3ae295a97cae10d736fc22c24f3df644c6

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