Malicious PDF — malware analysis report

Static analysis result for SHA-256 620a38d913cb2045…

MALICIOUS

PDF

97.5 KB Created: 2021-09-08 22:10:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 75bac99c13eeba833e6a374034e58c39 SHA-1: 74e8012e739e91d49356b765ee6e5e6769cd8457 SHA-256: 620a38d913cb2045a5aec2f7872f9759ecc21e40636965cedf69c21229f0218a
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF file flagged by ML classifiers and ClamAV as malicious. It contains numerous embedded URLs, with one heuristic identifying it as a link farm on disposable hosting. The document body is heavily obfuscated, but the presence of external URIs and the link farm heuristic suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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 http://geometrarontani.it/userfiles/files/gozemuzesagegukedexovif.pdf In PDF document text
    • http://qianlong99.org/ckfinder/userfiles/files/93053873547.pdfIn PDF document text
    • https://queensflower.nl/clientfiles/tikuwimitezidule.pdfIn PDF document text
    • http://jysfh.com/upload_fck/file/2021-9-7/20210907093519739264.pdfIn PDF document text
    • http://akifkasaboglu.com/esatfisek/images_upload/files/62663680264.pdfIn PDF document text
    • http://taiwangallant.com/uploads/files/202109060804498654.pdfIn PDF document text
    • https://simbhaolipower.com/images/file/nonegibu.pdfIn PDF document text
    • http://tano-cable.com/d/files/zekoganenimolasadobajup.pdfIn PDF document text
    • http://bonezi.morefriendship.com/upload/files/40194175200.pdfIn PDF document text
    • http://sabaparsian.com/ckeditor/files/files/78512190022.pdfIn PDF document text
    • http://www.lovebliss.tw/UserFiles/files/nesewiruvekofowujijivex.pdfIn PDF document text
    • http://a-pro-peau.fr/userfiles/file/26678298152.pdfIn PDF document text
    • http://trainternational.in/wp-content/plugins/formcraft/file-upload/server/content/files/1613252906aa02---50783423369.pdfIn PDF document text
    • http://www.autoservis-hubatka.cz/admin/upload/ww/file/41559852822.pdfIn PDF document text
    • https://elsa-daulte.com/ckfinder/userfiles/files/ziruzajag.pdfIn PDF document text
    • http://ppfi-online.com/userfiles/file/wixenexawifa.pdfIn PDF document text
    • https://basisangka.com/contents/files/73387743331.pdfIn PDF document text
    • http://tndgdemo2.com/ckfinder/userfiles/files/badofitidigetifedutulaxor.pdfIn PDF document text
    • http://marcobernini.it/userfiles/files/bukud.pdfIn PDF document text
    • https://wmu24.ru/media/file/jopegoxafenizovenezu.pdfIn PDF document text
    • http://bunny888.com/ckfinder/userfiles/files/26812650663.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=transactional+analysis+in+psychotherapy+pdfPDF link annotation
    • 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_off000116b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116B3 18604 bytes
SHA-256: 6c8f4d8de498c388c6da4729edf2e7591db9182575740d8a556540734cdb7343
font_01_sfnt_off00014766.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14766 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00015f7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15F7D 10796 bytes
SHA-256: 290ecf5ce053d307090b8e8b8224b46e4a5efc5cfe8f2ea9f9965b6247fe64d1

Open this report in the interactive analyzer, or submit your own file for analysis.