Malicious PDF — malware analysis report

Static analysis result for SHA-256 58294dce5b0686e6…

MALICIOUS

PDF

92.0 KB Created: 2021-09-04 12:55:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 1e8ccc33c4ce272dbe118d264d57ba39 SHA-1: 4ec81658880a3e2f62be2cd3f4886b380907e0d3 SHA-256: 58294dce5b0686e6d3064bc0e701c07c0bd5f888b7981af2a882dda9fe38cc57
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The presence of numerous external links, including those hosted on compromised WordPress sites and disposable domains, suggests a phishing or malware distribution campaign. The heuristic 'SE_DOWNLOAD_BUTTON' further supports the lure-based attack pattern, aiming to trick users into downloading a payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://laborke.ru/uplcv?utm_term=bcece+merit+list+2019+pdf+download PDF link annotation
    • http://kingspec.su/wp-content/plugins/super-forms/uploads/php/files/910fk2nkdctpv16m0keuqmrmp1/xulobegud.pdfIn PDF document text
    • https://alice-immo.com/userfiles/file/71793979481.pdfIn PDF document text
    • https://wentworthre.com/wp-content/plugins/super-forms/uploads/php/files/e5094fda44c238b8af789c38a8f1a083/kolizegegivan.pdfIn PDF document text
    • http://aaykpn.com/uploads/editor/files/98959362330.pdfIn PDF document text
    • http://etkindenetim.com/resimler/files/wozaxuzuwenul.pdfIn PDF document text
    • https://sca-kc.org/scauserfiles/files/gomitijodobezuru.pdfIn PDF document text
    • https://tresonance.org/uploadfiles/vobivubotebigo.pdfIn PDF document text
    • http://belst.by/upload/file/tolujutukumot.pdfIn PDF document text
    • http://taxicityplus.ru/userfiles/file/woforigevuwabunifapuso.pdfIn PDF document text
    • http://sts-logistika.ru/wp-content/plugins/super-forms/uploads/php/files/5203c0700e9924c9037e1207afe673ff/52580156446.pdfIn PDF document text
    • http://willajarmar.pl/userfiles/file/tatipurarodotesotipero.pdfIn PDF document text
    • http://zjpjxt.cn/upload/uploadfile/file/16924713239.pdfIn PDF document text
    • http://modelkyujin.com/wp-content/plugins/formcraft/file-upload/server/content/files/16119246743ba8---zewadikovizotitegafasi.pdfIn PDF document text
    • http://homespakistan.net/magzine/uploadfiles/file/roremujuvodomaxafadeg.pdfIn PDF document text
    • https://www.psalighting.com/wp-content/plugins/super-forms/uploads/php/files/3233c3e1dd678b33242e2678113889fa/4800610250.pdfIn PDF document text
    • https://yenhuy.vn/upload/files/78338055002.pdfIn PDF document text
    • http://www.optionassurance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1608d4bb554ea3---98949196270.pdfIn PDF document text
    • http://www.shipsupply.co.mz/wp-content/plugins/formcraft/file-upload/server/content/files/160d016733ad7b---susuwafudedesa.pdfIn PDF document text
    • http://jjmcp.jp/userfiles/Image/file/779986911.pdfIn PDF document text
    • http://utopiasacramento.org/clients/0/07/071cdeedc048305be324eb10ab8031d4/File/vadogagebokesonafotope.pdfIn PDF document text
    • https://kalatranslation.co.uk/wp-content/plugins/super-forms/uploads/php/files/fhuo4klq0f892oih1pkmbq53r6/xizumeweginigodak.pdfIn PDF document text
    • http://www.x454.com/wp-content/plugins/super-forms/uploads/php/files/7ifki0u61uu1rr59f34q6u6in5/kelak.pdfIn PDF document text
    • http://valsadindustries.com/userfiles/file/73378059079.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_off0000fc42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC42 11384 bytes
SHA-256: dee9b5451416409b25d77ce28f296be3185e2ed74fd27e63804e6d717f119521
font_01_sfnt_off00011736.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11736 19500 bytes
SHA-256: b83f3764386d6a40a7e4237195e3c55cea8d34e435967e309caa7e4219046037
font_02_sfnt_off00014a0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14A0E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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