Malicious PDF — malware analysis report

Static analysis result for SHA-256 da88c50760575bc1…

MALICIOUS

PDF

68.3 KB Created: 2021-09-25 00:50:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 6d3578e6713e2745bc71171aeef3da32 SHA-1: 38c3ba6cbd79ea9293fab819e0c29a5ee7a5d5b5 SHA-256: da88c50760575bc15117a9f9f1246e0b4437d7062a91d5bc9078ea27c8a1e98c
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF exhibits characteristics of a phishing lure, including being image-heavy with minimal text and containing numerous external links. The ML classifier and ClamAV detection strongly indicate malicious intent. The presence of many URLs hosted on disposable domains suggests an attempt to distribute malicious content or redirect users to phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9957

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
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 2 text block(s), carries a click-outward action, and is only 68 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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://philabc.ru/uplcv?utm_term=mod+apk+for+car+parking+multiplayer PDF link annotation
    • http://revucue.com/ckfinder/userfiles/files/77437473212.pdfIn PDF document text
    • http://retroldn.com/userfiles/file/59180825911.pdfIn PDF document text
    • http://proxima-design.cz/files/file/vabimijotukodo.pdfIn PDF document text
    • https://eltechma.com/zdjecia/fck/file/nojumevovanogofop.pdfIn PDF document text
    • http://kiuruvedenlukio.fi/tiedostot/file/nesevavomatizofuvivilo.pdfIn PDF document text
    • http://conhantaoankhanh.com/webroot/img/files/sowexoluzubezigad.pdfIn PDF document text
    • https://dadesigning.com/daduserfiles/files/39833488191.pdfIn PDF document text
    • http://hyosangjo.com/userfiles/file/20210903095730.pdfIn PDF document text
    • http://pribatu.lamilagrosaimport.com/images/files/xavebafewenumatejo.pdfIn PDF document text
    • http://maility.pl/_ADRESuserfiles/file/dibuwewebitawumadoganiki.pdfIn PDF document text
    • https://kccegis.com/upfiles/content/file/20210914012112.pdfIn PDF document text
    • https://mimpishio1.com/contents/files/gejidugosu.pdfIn PDF document text
    • https://bunian-co.com/other_files/File/86119695028.pdfIn PDF document text
    • https://3visiontech.com/piceditor/file/57769741835.pdfIn PDF document text
    • https://weeb.nu/userfiles/file/27704088087.pdfIn PDF document text
    • http://usagimatur.com/files/others/rabowokubek.pdfIn PDF document text
    • http://bischofs-scheune.de/userfiles/file/xupekur.pdfIn PDF document text
    • https://www.pirkitpadangas.lt/ckfinder/userfiles/files/95492643363.pdfIn PDF document text
    • https://yingzhaoliuart.com/upload/file/pajajebarud.pdfIn PDF document text
    • https://www.lang-mayer.de/wp-content/plugins/formcraft/file-upload/server/content/files/16132433230308---28073616203.pdfIn PDF document text
    • https://coil.hk/upload/files/zebas.pdfIn PDF document text
    • http://turchifiltri.com/userfiles/files/92515065151.pdfIn PDF document text
    • https://ikincielinmak.com/upload/ckfinder/files/36507131247.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_off0000ae3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAE3A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c64c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC64C 14376 bytes
SHA-256: 0fd594ad3d31a28605241880941c0a85a569fd168665e11fd241f16a6269c472
font_02_sfnt_off0000ea3e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA3E 11096 bytes
SHA-256: 3954c5c251f420e969f32ec77ea2c7a7c39f2583806a1e37d530e85f98e14b99

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