Malicious PDF — malware analysis report

Static analysis result for SHA-256 11449436a68c5863…

MALICIOUS

PDF

75.5 KB Created: 2021-09-13 03:14:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 79cf71e14cb1fca84c9e7fc78225603d SHA-1: 280dfc1de6ea1ff8eedb4c275e286b844c6eb511 SHA-256: 11449436a68c5863e01682ff0cca65c99d0eecc07216fce4d8a4583e12f47582
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a large number of embedded URIs, many of which point to disposable hosting and are likely used for phishing or to download further malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and numerous external links suggest an attempt to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

Heuristics 5

  • 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 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://pixomot.ru/uplcv?utm_term=cool+math+games+learn+to+fly+idle PDF link annotation
    • https://pomacanthe-art.fr/imagebeforeafter/files/fegusifapogalon.pdfIn PDF document text
    • https://xn--49st2et51duvk.com/upload/files/gosiwa.pdfIn PDF document text
    • https://marblo.ph/app/webroot/img/files/rivotes.pdfIn PDF document text
    • http://emeat.ru/var/files/furekiwonovewasa.pdfIn PDF document text
    • http://alteredcompta.com/buddha/ckfinder/userfiles/files/10160681363.pdfIn PDF document text
    • http://jaatkinson.com/userimages/fowinaxodajipigad.pdfIn PDF document text
    • https://anninhsieuthi.online/upload/files/77231532469.pdfIn PDF document text
    • http://internet-trade.eu/UserFiles/file/kemojufowebupuze.pdfIn PDF document text
    • https://www.milestonesmn.org/ckfinder/userfiles/files/remekalunovuwe.pdfIn PDF document text
    • http://hylimusic.com/fckeditor/editor/filemanager/connectors/php/userfiles/file/nererabimipaximexoxade.pdfIn PDF document text
    • http://tabletopad.com/images/file/13986620987.pdfIn PDF document text
    • http://www.hypnotiseur.com/wp-content/plugins/formcraft/file-upload/server/content/files/16139972a4b658---73022699415.pdfIn PDF document text
    • http://tramtronbetong.com/uploads/userfiles/file/xakalo.pdfIn PDF document text
    • http://panel2conso.com/userfiles/file/xunigipebofixas.pdfIn PDF document text
    • http://xn--b1amishc2fb.xn--p1ai/ckfinder/userfiles/files/93558303965.pdfIn PDF document text
    • https://bedandbreakfastchia.it/userfiles/file/50771302802.pdfIn PDF document text
    • https://ltssinternational.com/res/wysiwyg/file/51256515977.pdfIn PDF document text
    • http://kfnmsz.com/upfolder/e/files/20210904072633.pdfIn PDF document text
    • https://eletroluz-al.com/_IMG/img_internas/file/32054298000.pdfIn PDF document text
    • http://ppogrimall.com/upload/editor_image/file/23844112213.pdfIn PDF document text
    • http://harissarantis.com/userfiles/files/bofeno.pdfIn PDF document text
    • https://divetechmarine.com/contents/files/44574579517.pdfIn PDF document text
    • http://pol2-simf.ru/userfiles/file/40183906904.pdfIn PDF document text
    • https://trsoftyazilim.com/genelresimler/file/dubazusitenobaxubuzixax.pdfIn PDF document text
    • http://mydreamtuscanwedding.com/editor_up/89662928866.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c481.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC481 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000dc98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC98 10948 bytes
SHA-256: ad8f9275f8482acfee67e56a9ab04ec639df4b7ff1e8fdb2b50b16f9d39bf1b2
font_02_sfnt_off0000f59b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF59B 16572 bytes
SHA-256: 84acc5366d278df6b99b9b952069be807c600a1da432705516580d06c7abfd49

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