Malicious PDF — malware analysis report

Static analysis result for SHA-256 85ea69739e70d2a4…

MALICIOUS

PDF

84.9 KB Created: 2021-09-08 22:23:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: aaaa7eb52c0418ce8de55b63a99a3831 SHA-1: 4f786191dd1c3bc592c3f663e4c0e2695ba8c67f SHA-256: 85ea69739e70d2a4e6715dfe8a256572a10e966be8385838430cd4d2cc90263f
126 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, many pointing to disposable domains, suggesting a link farm or phishing lure. The PDF structure and embedded content, despite being heavily obfuscated, are consistent with attempts to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://holycrosshealthcare.com/userfiles/files/retejegikubefezi.pdf In PDF document text
    • http://bantinnhadat.com/users/files/15611821675.pdfIn PDF document text
    • https://farmaciasacoor.com/site/upload/file/87524401761.pdfIn PDF document text
    • https://bliznacite.dvsportbg.com/files/zusirosovapekalezus.pdfIn PDF document text
    • http://nextlab-semi.com/files/fckeditor/file/26837603710.pdfIn PDF document text
    • http://moveworldtogether.com/datas/files/pukazakilibigalixu.pdfIn PDF document text
    • https://onwater.my/uploads/file/46758942843.pdfIn PDF document text
    • http://syntrend.critical.tw/upload/files/bifilawiwibus.pdfIn PDF document text
    • https://greenways.at/userfiles/file/malutaxafu.pdfIn PDF document text
    • http://xn--80aafkqcanfpgnhbng3b5i9a.xn--p1ai/pict/file/wonawivotani.pdfIn PDF document text
    • https://2-view.org/home/view/public_html/ckfinder/userfiles/files/lavoletitugifu.pdfIn PDF document text
    • http://teplospectr.ru/images/files/38674146097.pdfIn PDF document text
    • http://www.addvanceo.info/userfiles/files/garazunegomizen.pdfIn PDF document text
    • http://coumert.com/images/file/44776997446.pdfIn PDF document text
    • http://movitecnic.fr/ressource/site-image/files/jekowaxus.pdfIn PDF document text
    • https://www.jemelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/161377109a115d---59923374916.pdfIn PDF document text
    • http://studiotecnicopinto.it/userfiles/files/bikuzu.pdfIn PDF document text
    • https://jf-orvalho.pt/userfiles/file/loraragewexibanuxuk.pdfIn PDF document text
    • http://santamariamikado.com/uploads/files/40536829886.pdfIn PDF document text
    • http://potlista.com/file/files/95897119214.pdfIn PDF document text
    • http://edilgroupdigiovanni.it/userfiles/files/90209032045.pdfIn PDF document text
    • https://darkoyunpin.com/calisma2/files/uploads/8508539728.pdfIn PDF document text
    • http://ticaproduce.com/ckfinder/userfiles/files/neposepigatenimipox.pdfIn PDF document text
    • http://solarexperten.ch/fckeditor/editor/images/file/wawojamuxagexejojotobek.pdfIn PDF document text
    • https://3eyamaichi.com/upload/ckfinder_temp/files/20210905025333.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=que+lenguaje+se+usa+para+programar+en+androidPDF 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_off0000e44d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE44D 10924 bytes
SHA-256: 74d4698570e223ada5cab0dfc7fb032438b7c34f583a9193e84828ac4b848c2a
font_01_sfnt_off0000fd63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD63 18776 bytes
SHA-256: 602d5d8f6239befe4eecbfd0f3c252713c7d4e03e831eda193de1481fbb2c650
font_02_sfnt_off00012d57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D57 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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