Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a78cfdb99a7a4ef…

MALICIOUS

PDF

78.4 KB Created: 2021-09-20 01:26:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: c65189f30edefc7ab8ec8c7d1228c636 SHA-1: 15dd9b907522282c644dede7346ffd72313e9822 SHA-256: 0a78cfdb99a7a4efc23b9be3d2f4d321e210a52bd051f58357030be819e99a9d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a link farm pointing to compromised websites, with one URL specifically mentioning 'download euro truck simulator 2 apk', suggesting a lure for software downloads. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. No scripts were extracted, but the PDF structure and embedded URLs are indicative of a phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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://pixomot.ru/uplcv?utm_term=download+euro+truck+simulator+2+apk PDF link annotation
    • http://www.parkwaytransplant.com/media_upload/upload/files/firawo.pdfIn PDF document text
    • http://greatwalledmond.com/ckfinder/userfiles/files/55024878316.pdfIn PDF document text
    • https://www.ideaklinik.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/161440f1de4f95---lutivukatuper.pdfIn PDF document text
    • http://commune-bourre.com/userfiles/file/53203518013.pdfIn PDF document text
    • https://altonika.pro/files/fck/file/4392243671.pdfIn PDF document text
    • http://moretonassets.net/userfiles/758250874.pdfIn PDF document text
    • http://rotang.net/userfiles/file/zolebopaxolubipow.pdfIn PDF document text
    • http://www.nisbd.com/wp-content/plugins/formcraft/file-upload/server/content/files/16145c9e211044---miwivonasarakapidu.pdfIn PDF document text
    • https://songhongresort.com/img/files/vujopoziles.pdfIn PDF document text
    • http://kreativitaet-stadlhofer.at/global/images/userfiles/file/duwozukijavuporununaki.pdfIn PDF document text
    • http://gamax-motor.cz/data/dokumenty/46911390425.pdfIn PDF document text
    • http://pokewaveanaheim.com/uploads/files/rafuvexafonulapokonu.pdfIn PDF document text
    • http://digilit.ir/basefile/digilitir/files/pigesowidomotivajikixad.pdfIn PDF document text
    • http://sotel-perm.ru/site/file/98940377362.pdfIn PDF document text
    • http://nhasachnguyenvancu.com/Images_upload/files/zegunedi.pdfIn PDF document text
    • https://dpt-mh.com/uploads/news/files/jaton.pdfIn PDF document text
    • http://gomsuhoangminh.com/app/webroot/uploads/files/fugonidaxokadeju.pdfIn PDF document text
    • https://korzayithalat.com/spot/admin/fckeditor/userfiles/file/60433496520.pdfIn PDF document text
    • http://scpt.it/userfiles/files/gugitonafabiniwuxawe.pdfIn PDF document text
    • http://violetstudio.in/userfiles/file/gupunuzosorebabexolo.pdfIn PDF document text
    • http://itkaufmann.com/images/fckimages/file/vimiporobilovekazuvejasat.pdfIn PDF document text
    • http://feuerwehr-mittenwalde.de/mediathek/files/54228757426.pdfIn PDF document text
    • https://hps-gruppe.com/wp-content/plugins/super-forms/uploads/php/files/f0otka593ff5ahtij9mjubvlrm/72546285696.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_off0000cf75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF75 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e78c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE78C 11076 bytes
SHA-256: 2980038bdd9138120fc2a4c1189dc6529da784d57dbd27da99b147eea4998839
font_02_sfnt_off0001016e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1016E 16304 bytes
SHA-256: be8515340096b01a6c52ccdcd53f2a74955749532a98c6162391428351304dd7