Malicious PDF — malware analysis report

Static analysis result for SHA-256 3021c10b616ffbc0…

MALICIOUS

PDF

82.9 KB Created: 2021-09-21 15:43:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: d632629c8e26e019dc47c4fdd3190cfe SHA-1: 4b9693802aaeda290a9deed4697a4d48add23042 SHA-256: 3021c10b616ffbc0fdfe10071e34311fa41f86283fc85480f33545e9d95b365b
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, a common technique for exploiting PDF vulnerabilities or redirecting users. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a large number of external links, suggesting a phishing or content-farming operation. ClamAV also detected this as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://headrepublic.pl/images/files/165499477.pdf In PDF document text
    • http://metalzilembo.it/userfiles/files/35593585147.pdfIn PDF document text
    • https://distriparkbotlek.nl/userfiles/files/wilabaran.pdfIn PDF document text
    • https://bnovum.hu/downloads/70407182786.pdfIn PDF document text
    • https://mytalk7.com/_UploadFile/Images/file/63371987818.pdfIn PDF document text
    • http://parbatsamajjapan.com/img/files/files/56360709737.pdfIn PDF document text
    • http://erex.hu/upload/file/97422895250.pdfIn PDF document text
    • http://2m-m.eu/userfiles/files/12966094266.pdfIn PDF document text
    • https://bahia-group.com/ckfinder/userfiles/files/nasoxomitam.pdfIn PDF document text
    • https://pikhospital.com/ck_uploads/uploads/files/duwavofenidab.pdfIn PDF document text
    • https://www.sblending.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1613c368999ba4---83194703802.pdfIn PDF document text
    • http://anchor-m.com/js/upload/files/nirinarulu.pdfIn PDF document text
    • https://sunsetlearningcenter.com/userfiles/file/kajakonojazakogivopuman.pdfIn PDF document text
    • http://sung1.com/upload/files/77043140275.pdfIn PDF document text
    • http://pegastelco.com/pictures/files/66039471744.pdfIn PDF document text
    • https://takipcisec.com/calisma2/files/uploads/lakuvunazif.pdfIn PDF document text
    • http://mispuntossaga.com/campannas/file/59454115426.pdfIn PDF document text
    • http://print-printonline.com/ckfinder/userfiles/files/dapefoxunutax.pdfIn PDF document text
    • https://themodernla.com/wp-content/plugins/super-forms/uploads/php/files/7543458696e8d624454620deaa712db3/gijesi.pdfIn PDF document text
    • http://techmechengineers.com/uploads/mefewodejenefejavel.pdfIn PDF document text
    • http://halanmilk.com/upload/files/riwepanawo.pdfIn PDF document text
    • http://xn--80aafbjcazdrhzgiddbbcsg4l.xn--p1ai/pict/file/48743190283.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=blossom+blast+saga+cheatsPDF link annotation
    • http://s292376414.onlinehome.fr/datas/imgmail/file/84927352031.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_off0000dd6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD6D 18436 bytes
SHA-256: 1e102e1516a28078cf526e0bcfd2233e9365869e0f6245adb4be980ac620fd8d
font_01_sfnt_off00010dc5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DC5 10576 bytes
SHA-256: 2beef14dd5c1cc9aee1486292785d05cda1055887b14f73abb595e7a33659563
font_02_sfnt_off0001260c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1260C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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