Malicious PDF — malware analysis report

Static analysis result for SHA-256 d5f41f6eda73672e…

MALICIOUS

PDF

82.6 KB Created: 2021-09-12 07:37:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 30558da88ddcc286ee7591bcd3868dd2 SHA-1: ba5fd39cc9251655e95320e687dd0c68b4aebdb0 SHA-256: d5f41f6eda73672e4a603f05e7ef810a909ee329e61e1dc006f873b2b3e93229
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The PDF contains numerous embedded URLs, many of which point to other PDF files, suggesting it functions as a link farm. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' specifically flags this behavior. While no scripts were extracted, the structure and numerous external links strongly suggest an attempt to redirect users to potentially harmful content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://www.elektrobetrieb-scholz.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613010aa2fe8d---banasozejadipefela.pdf In PDF document text
    • https://scalper.ir/data/files/file/zunilukotivego.pdfIn PDF document text
    • http://szjg.hu/images/file/37328214570.pdfIn PDF document text
    • http://saraya-shop.ru/upload/files/99698171234.pdfIn PDF document text
    • https://alusol-kw.com/ckfinder/userfiles/files/todesefetifosenezesot.pdfIn PDF document text
    • https://www.peltonfell.org.uk/ckfinder/userfiles/files/pewomokal.pdfIn PDF document text
    • https://seikai.jp/free_images/files/43398270218.pdfIn PDF document text
    • http://saktigroup.in/uploads/tabosoleziziwu.pdfIn PDF document text
    • http://dolekkoyum.com/admin/UserFiles/file/83587133265.pdfIn PDF document text
    • http://sangjeom.com/userfiles/file///59564222072.pdfIn PDF document text
    • https://cfi-registration.org/buzzboxgift/img/userfiles/files/livuxazulobire.pdfIn PDF document text
    • http://marinapogon.pl/upload/file/zegiwogelajurex.pdfIn PDF document text
    • http://dnt-mayak.ru/content/File/gaxabinokisexu.pdfIn PDF document text
    • https://lyna-garage.com/htdocs/cljr/data/files/64115098364.pdfIn PDF document text
    • http://movesearchesuk.com/userfiles/file/58750276908.pdfIn PDF document text
    • http://kapfenberger-schuetzenverein.at/userfiles/file/93316841336.pdfIn PDF document text
    • https://saunadlaciebie.pl/userfiles/file/babogezumunozuxuju.pdfIn PDF document text
    • https://foodexgida.com/uploads/files/71210170597.pdfIn PDF document text
    • http://donateagift.eu/userfiles/file/sepazejexejibazakune.pdfIn PDF document text
    • http://www.hgekc.com/media/userfiles/file/lozupusipilumosi.pdfIn PDF document text
    • http://yieldpharm.com/upload/files/25961625855.pdfIn PDF document text
    • http://sameiroeventos.pt/ficheiros/55005409347.pdfIn PDF document text
    • http://misterholidaysanprisco.it/userfiles/files/wojeporasifoxenexara.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=cast+android+screen+to+macbookPDF 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_off0000da26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA26 19044 bytes
SHA-256: 155d51da7d3358517ca91b737bd6d693e38c8e49902dfe8593c6244ab018e59c
font_01_sfnt_off00010bcd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BCD 10748 bytes
SHA-256: 64c36ef9fa419b169539a28cc0cd160969ebec4266d4fcd7d8d1a24a1183d5f8
font_02_sfnt_off0001248d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1248D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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