Malicious PDF — malware analysis report

Static analysis result for SHA-256 fdf1892b4753925e…

MALICIOUS

PDF

75.7 KB Created: 2021-03-22 03:01:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 16bf72227df9d4b5319a285a0749004a SHA-1: 34cfd1fa431466f061e0b44c84a9faa91badd832 SHA-256: fdf1892b4753925eef8670bbf975f32f74aded8063261a4a779c61761a59682a
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains a large number of external links, many pointing to disposable domains and Weebly subdomains, indicating a link farm or SEO manipulation scheme. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or distributing further malware. Although no scripts were explicitly extracted, the PDF structure and numerous external URIs are indicative of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://dugedepap.ru/wix?keyword=joker+online+movie PDF link annotation
    • https://jaloteke.weebly.com/uploads/1/3/4/0/134096083/guvenujelogo.pdfIn PDF document text
    • https://patewowuxafopon.weebly.com/uploads/1/3/4/5/134595548/jutok_dibozumebipu.pdfIn PDF document text
    • https://bifekanivixu.weebly.com/uploads/1/3/1/4/131408854/7430274.pdfIn PDF document text
    • https://zipawesijapa.weebly.com/uploads/1/3/4/4/134494223/68cd3c2899b.pdfIn PDF document text
    • https://dewajijivixire.weebly.com/uploads/1/3/4/6/134638152/puris.pdfIn PDF document text
    • https://gakatonigi.weebly.com/uploads/1/3/2/6/132681340/661046.pdfIn PDF document text
    • https://wixumiwob.weebly.com/uploads/1/3/0/7/130776296/1777899.pdfIn PDF document text
    • https://nefirekemoziwep.weebly.com/uploads/1/3/4/3/134332842/bb7ee.pdfIn PDF document text
    • https://gojatoxemoniro.weebly.com/uploads/1/3/4/8/134894745/jubilaganogim.pdfIn PDF document text
    • https://pedumodab.weebly.com/uploads/1/3/1/6/131637036/5863674.pdfIn PDF document text
    • https://xotugakifegug.weebly.com/uploads/1/3/4/1/134131530/f5c9e90206c0f.pdfIn PDF document text
    • https://dowawanezezezo.weebly.com/uploads/1/3/1/0/131070762/wolikawitomovagew.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://figadadir.rf.gd/fadonukix.pdfIn PDF document text
    • http://jidufapikefufeb.epizy.com/fix_the_sentence_worksheets_6th_grade.pdfIn PDF document text
    • http://pixagikaw.epizy.com/wuvalopegevunaxibexekina.pdfIn PDF document text
    • https://df4002df-ed14-466c-b758-10ced248c840.filesusr.com/ugd/3b03e6_e26453a7180741779a6377dde0e3f158.pdf?index=trueIn PDF document text
    • https://77bac38d-831a-46d6-8f22-d7743fcadc58.filesusr.com/ugd/5b9a87_c43771a647ac4d9c9fb4aded922e1fbe.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/787b3aa5-1e02-4651-b5e1-a6f29e2b6044/81897040768.pdfIn PDF document text
    • http://lokuvutifinulef.rf.gd/cheat_sheet_html5_css3.pdfIn PDF document text
    • https://9d1e48ad-bcd7-4831-9b7b-7108443a63b6.filesusr.com/ugd/136d07_a497569367464ba78e87397e884c6a9d.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/2da33054-e55b-409a-a350-28a797e7b8ca/war_of_the_worlds_2_the_next_wave_full_movie_in_hindi_watch_online.pdfIn PDF document text
    • http://zagebixomibolo.rf.gd/kmsauto_activator_office_2016_free.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_off0000ecc1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECC1 4556 bytes
SHA-256: 51e00463d30953932114243dc5a74af64882010f0e15c5c2c719da9cc8b9bf1b
font_01_sfnt_off0000fc37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC37 10640 bytes
SHA-256: c7ec57db30adff0027a28b48aed1732e76bbb5ca7187c0852c94b5d2443a83f2