Malicious PDF — malware analysis report

Static analysis result for SHA-256 d8bd60149fdd236b…

MALICIOUS

PDF

81.1 KB Created: 2021-03-15 17:40:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: d9cac4497f95e3993028dd3602673e56 SHA-1: d449b82c2af496d6fb8adfe94acf0f3fdec90289 SHA-256: d8bd60149fdd236b112b92db2522ba7a9d31099d8f4f07eecf5a724c1ffb4524
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 0.9992

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://nipisod.ru/wix?keyword=best+manual+can+opener+amazon PDF link annotation
    • https://rajilogibakew.weebly.com/uploads/1/3/5/3/135326989/8798815.pdfIn PDF document text
    • http://sawemawe.mywebcommunity.org/36584874643.pdfIn PDF document text
    • http://rosativiwam.mypressonline.com/angular_8_tutorial_for_beginners.pdfIn PDF document text
    • https://lamujotidavupat.weebly.com/uploads/1/3/4/3/134375272/rirakaxesijadin-buvomitazoze-wegub-disanoxapokuro.pdfIn PDF document text
    • http://potuxoposutu.medianewsonline.com/frigidaire_gallery_dryer_repair_manual.pdfIn PDF document text
    • http://titagupux.22web.org/febrile_neutropenia_guidelines_2020_idsa.pdfIn PDF document text
    • http://djami.ru/jolly_phonics_book_1_freef0cl2.pdfIn PDF document text
    • https://tubekari.weebly.com/uploads/1/3/1/6/131636965/ba494ec666c1.pdfIn PDF document text
    • https://rerutafedebe.weebly.com/uploads/1/3/2/8/132815298/pexojiduv.pdfIn PDF document text
    • http://autokenn.com/xaporoqty0b.pdfIn PDF document text
    • http://consumer-data-protection-bureau.com/50722819403f47fc.pdfIn PDF document text
    • https://vejilete.weebly.com/uploads/1/3/5/3/135312445/mobibanija.pdfIn PDF document text
    • https://wifadesar.weebly.com/uploads/1/3/5/3/135345928/golebamoxo.pdfIn PDF document text
    • http://biraxubidu.22web.org/does_the_garmin_drive_52_have_free_map_updates.pdfIn PDF document text
    • http://tobufupevujuma.mygamesonline.org/libotezagolusesinalite.pdfIn PDF document text
    • https://rexekimat.weebly.com/uploads/1/3/4/0/134017736/tafuju.pdfIn PDF document text
    • https://tujilebofali.weebly.com/uploads/1/3/5/3/135398949/64d845521f4751.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://1cbf0fd9-62af-4102-a3dc-982f361539e7.filesusr.com/ugd/bfbc46_80b55073e1464d689345a352a7e667ed.pdf?index=trueIn PDF document text
    • https://a9f3490c-def6-45ea-9957-aefa341d54bd.filesusr.com/ugd/84b587_cf591372ee8743b2994afcb661880049.pdf?index=trueIn PDF document text
    • https://9042e326-c85f-44e6-b9b6-0c206471fdba.filesusr.com/ugd/0d2fda_9873bf7a40294f4fadc22804f4779340.pdf?index=trueIn PDF document text
    • http://nogomazarem.epizy.com/nolugabojufapigiziwimuna.pdfIn PDF document text
    • https://58552d80-c20c-4e4f-99b9-91bedbcc07a3.filesusr.com/ugd/c18496_d73a044ba6c246868a87a55317844573.pdf?index=trueIn PDF document text
    • https://acbe2b0b-ee64-4eea-b0ce-372b1aa9cc7a.filesusr.com/ugd/4bcc67_63228f794bd04006889df30517ec4846.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_off0000f2ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2AB 5012 bytes
SHA-256: 33d734a18accee738bf672dbd9e848cd76d9f7e53875aa857f86bccd63d34991
font_01_sfnt_off0001039c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1039C 10848 bytes
SHA-256: 6cb96f7b9ec739f173329b93059370504a005d1aa9cd27ae6b1747f5c7035e3e
font_02_sfnt_off000128cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128CD 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e