Malicious PDF — malware analysis report

Static analysis result for SHA-256 e189e290cf9bd296…

MALICIOUS

PDF

78.4 KB Created: 2021-09-02 02:31:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: e37d829e819c712dc9f617f8303142ef SHA-1: f5deff304384b67b522e2a48b852ae1df0cf38d2 SHA-256: e189e290cf9bd2968ecbd7504ce1bc001be802e41503eeb9d2c17b2e109d4c3f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. Heuristics reveal it functions as a link farm, directing users to multiple external websites, many of which are hosted on compromised CMS platforms or disposable hosting. The embedded URLs suggest an attempt to distribute phishing content or further malware payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

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
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://atmaircenter.com/lb/userfiles/files/gekabuxina.pdf In PDF document text
    • https://dezsredstvompx.ru/wp-content/plugins/super-forms/uploads/php/files/9fe27f1486f36a6249a78430a4a09bfa/8199865650.pdfIn PDF document text
    • https://doina.md/fckeditorfiles/file/zasefaxejimane.pdfIn PDF document text
    • https://tucsonhomewindowtint.com/wp-content/plugins/super-forms/uploads/php/files/3e9be55ef767a643e45117ed3cef0c8e/fujoronekatubazexegape.pdfIn PDF document text
    • http://lisahyatthealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d86dfb9194---93259687811.pdfIn PDF document text
    • http://malagi.pl/user-files/fck/file/tomiwogozizesululikofiw.pdfIn PDF document text
    • http://worldofpacifiers.com/editor_uploads/system/files/40935830612.pdfIn PDF document text
    • http://www.tobywells.org/media/fckdir/file/wekonagofunabe.pdfIn PDF document text
    • http://www.sunarmisir.com.tr/wp-content/plugins/super-forms/uploads/php/files/igl1rc7hokh5erg1hpjb19do76/56588776086.pdfIn PDF document text
    • http://gpmpoolandspa.com/ckfinder/userfiles/files/rurukixoxabodulozesafon.pdfIn PDF document text
    • http://a2itsolutions.com/chop/multimedia/userfiles/file/dokofusigip.pdfIn PDF document text
    • http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/i1c26vvkb611nud7fc7tn7sdl7/95132200323.pdfIn PDF document text
    • https://edoxmarketing.com/wp-content/plugins/super-forms/uploads/php/files/k3njq79amebunnn9ld620dpa1j/25389212180.pdfIn PDF document text
    • http://sewakendragroup.com/userfiles/file/rudisuwoxabanewined.pdfIn PDF document text
    • https://gift-edu.ru/wp-content/plugins/super-forms/uploads/php/files/62a192b2f80212b4b4031e89e2078681/susabomaliwexanudakawib.pdfIn PDF document text
    • http://aep-tc.com/cache/fck_files/file/wezuxagurewibawarakiduja.pdfIn PDF document text
    • http://dalaichau.com/files/wikukisibibo.pdfIn PDF document text
    • http://sanxuatbanthinghiem.org/app/webroot/uploads/files/86737960284.pdfIn PDF document text
    • https://www.alignerco.ca/wp-content/plugins/super-forms/uploads/php/files/a514699dbc599b316541f974898628d1/48103795178.pdfIn PDF document text
    • http://iphysiology.ru/upload/64482496327.pdfIn PDF document text
    • https://pmsp-me.com/userfiles/files/worilemuragipugukatepuvam.pdfIn PDF document text
    • http://saltokisport.com/uploads/files/wulim.pdfIn PDF document text
    • https://nuregio.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a32caf58781---komadutodufuzorufaduvonuw.pdfIn PDF document text
    • https://www.prowallpanama.com/wp-content/plugins/super-forms/uploads/php/files/03dddb3eeb56d75f50e79e5a5e804a7c/xijubavinisekesafugimoxa.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=critters+in+spacePDF 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_off0000ce63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE63 17512 bytes
SHA-256: eade041b8fcf3059bffdc6c7f0ad025165dfc511600b9bc7fbd42cfa3a404b64
font_01_sfnt_off0000fc23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC23 10232 bytes
SHA-256: 72651a307c57fdf4c924f52ac884e965dee9fd67a9fd993c0243f4335bdd1eef
font_02_sfnt_off00011348.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11348 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1