Malicious PDF — malware analysis report

Static analysis result for SHA-256 081dadab8eb13b67…

MALICIOUS

PDF

102.0 KB Created: 2021-06-30 11:56:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: f5ba1fd7dcfc5c09a35004c15a11c301 SHA-1: 7c57390684e891136db9e4ae0155213a208e7175 SHA-256: 081dadab8eb13b676f5cb1878761782bcd34ee21dd62ee8b104e077f5efeb259
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed for malicious redirection. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware delivery. Although no scripts were directly extracted, the structure and URL patterns are consistent with a malicious document used as an initial vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9787

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 https://philabc.ru/uplcv?utm_term=for+all+creatures+great+and+small
    • http://supporttmes.com/clients/2/26/2647aeee05d38019bb2ff7af4ee9f9d5/File/takikulusidazobamawizij.pdf
    • http://xn--e1aazeoc7d.xn--p1ai/images/shared/file/23334236185.pdf
    • https://skyfireconsulting.com/wp-content/plugins/super-forms/uploads/php/files/hvf5hiu4vq6alv0faff6vis76v/zimawopedubegitoni.pdf
    • http://subventionsbetrug.de/wp-content/plugins/super-forms/uploads/php/files/3t2kghmpr41fnphmtg2j5hkpo5/papikigirupazav.pdf
    • http://pvsystexperts.com/wp-content/plugins/super-forms/uploads/php/files/ce00427rr35pd455ososv7g466/xuvajogofu.pdf
    • https://afriqueitnews.com/wp-content/plugins/super-forms/uploads/php/files/a4af537be00a597601b71b536a96fbc5/99396532835.pdf
    • http://firegallery.ru/img/upload/luninutiperafila.pdf
    • http://www.insurancedirectcanada.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16086b03b0c582---24769987821.pdf
    • https://vate-tire.ru/wp-content/plugins/super-forms/uploads/php/files/f18944f4d373e653a0dc58f2400f6247/likezef.pdf
    • http://dui-antidote.net/images/userfiles/file/31777810108.pdf
    • http://tutek.eu/userfiles/file/mudurulepigov.pdf
    • https://myparrotfood.com/user_files/files/jigebix.pdf
    • https://protechlighting.com/wp-content/plugins/super-forms/uploads/php/files/a0ce937d2ab9385d29b4b5097c143e27/6367836722.pdf
    • http://udclassof1968.com/clients/74076/File/5176507367.pdf
    • http://alphaconsultinggroup.us/vpw/images/file/3741711688.pdf
    • https://audreyheselmans.com/_files/file/kadimuwisiwezuton.pdf
    • https://www.areatransfers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8647fb1260---42242888428.pdf
    • https://www.amiunaorchestra.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1606c78cf8291d---12841649168.pdf
    • http://sangiorgioautoservizi.com/userfiles/files/41072371832.pdf
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608be2a352225---newiliw.pdf
    • http://best-infosystems.com/userfiles/file/gekag.pdf
    • https://chp-travel.ir/data/file/jurepelenuzofez.pdf
    • https://amatnieks.lv/pictures/image/dazetego.pdf
    • http://ttccid.com/userfiles/files/duxiwinemewazugege.pdf
    • http://asfalon.com/__files/file/komejoxavezatugiferobuv.pdf
    • https://newat.ru/wp-content/plugins/super-forms/uploads/php/files/a3728a94976e48ecde9ca5cb018a4b04/nidezuma.pdf
    • https://festivalecolo.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160c8ef0318d1c---fododulinaferawo.pdf
    • https://halobysciton.com/wp-content/plugins/formcraft/file-upload/server/content/files/160991e752f221---89492737711.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012c43.bin
ea9c0f950c238f770cf339ff316022449f2e40611e198220e0c82c66c8bd7a85
pdf-font-stream PDF embedded font (sfnt) at offset 0x12C43 17396 bytes
font_01_sfnt_off000159ea.bin
4aa20f1dc9a8b38cdb6921e13779dff7d99952e677592daca216803246fbda4f
pdf-font-stream PDF embedded font (sfnt) at offset 0x159EA 10700 bytes
font_02_sfnt_off0001724b.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1724B 16792 bytes