Malicious PDF — malware analysis report

Static analysis result for SHA-256 46c382883b872ad2…

MALICIOUS

PDF

80.1 KB Created: 2021-03-11 06:50:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 3c7eae69290184b083fff7d6778c7d11 SHA-1: 95a0a1129ca5eb659c35963dbbabac1676fa1d70 SHA-256: 46c382883b872ad2007ea7fd1fed11c5c9c0bfaadee0992221f9e7a0e6e26207
186 Risk Score

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 0.9995

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://jumiwimov.ru/123?utm_term=bridal+makeup+hd+video PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4464330/normal_601b3efbe41b5.pdfIn PDF document text
    • http://bilet-pdd.site/fozowegikoxiwoypvjt.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4491414/normal_5ff2bcb37a1a7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374368/normal_5fc61120d5df3.pdfIn PDF document text
    • https://babanude.weebly.com/uploads/1/3/4/0/134017813/vadekomobomen_zonudomimezagef_vofemareveninas.pdfIn PDF document text
    • http://vinnipoh.space/ben_and_holly_colouringngbrm.pdfIn PDF document text
    • http://lurubalopare.sportsontheweb.net/what_does_the_woodcock_johnson_iv_measure.pdfIn PDF document text
    • https://lutomired.weebly.com/uploads/1/3/5/3/135316507/xibanovib.pdfIn PDF document text
    • http://kirakexig.mypressonline.com/36127000824.pdfIn PDF document text
    • https://jigaxokere.weebly.com/uploads/1/3/4/6/134622899/mulov.pdfIn PDF document text
    • https://susemozud.weebly.com/uploads/1/3/2/8/132814624/pofafejopo_fixixodugu.pdfIn PDF document text
    • http://shoppermarket.online/browser_file_from_urln73zn.pdfIn PDF document text
    • https://nozubewow.weebly.com/uploads/1/3/1/1/131164313/turojeviwavogiz.pdfIn PDF document text
    • https://kidamevu.weebly.com/uploads/1/3/1/4/131437276/7848201.pdfIn PDF document text
    • http://lightstart.xyz/bemejutebob58i7.pdfIn PDF document text
    • https://pitulero.weebly.com/uploads/1/3/2/6/132683003/4fb1ef7cdc93d4b.pdfIn PDF document text
    • https://lulodepi.weebly.com/uploads/1/3/0/7/130776712/vimipage.pdfIn PDF document text
    • https://dotolisode.weebly.com/uploads/1/3/4/6/134616401/lodili.pdfIn PDF document text
    • https://salupoxegiras.weebly.com/uploads/1/3/5/9/135961269/9bb29a571b6ec07.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://f7cac2f2-528f-490f-9bef-cb2448a877de.filesusr.com/ugd/529ba0_44f47db3e798441fb7514ef0accf2efe.pdf?index=trueIn PDF document text
    • https://3fb740b9-71d8-4183-8edb-de11b68c0a29.filesusr.com/ugd/1fbf8b_f30d3d702f6445a1bc2fc839120542f0.pdf?index=trueIn PDF document text
    • https://dd3528e8-ded0-4753-843e-0d3cb9f542e7.filesusr.com/ugd/4d6844_66d7edd414fc461d99c0b97332a8b9fd.pdf?index=trueIn 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ef31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF31 4892 bytes
SHA-256: be9a514d9e47fe1fb5cbc3c0292fb7c5f62246eb0908161e8edb93e51c7bb3b2
font_01_sfnt_off0000ffcf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFCF 11536 bytes
SHA-256: 9e6af52b351bb9daec319274b91c8fb95c3316eaa094ba6034cd1d311cb29157
font_02_sfnt_off00012544.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12544 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f