Malicious PDF — malware analysis report

Static analysis result for SHA-256 0aced0d9bfee35fe…

MALICIOUS

PDF

86.5 KB Created: 2021-09-07 19:25:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: bfc91d45855d0d6bfa00f303ff7fe5a6 SHA-1: 67587eb987c739dd692d775aeabe9cd3fb164066 SHA-256: 0aced0d9bfee35fec8f7b36b30d2883d0766125267a23d8591aae5c11c9cb778
156 Risk Score

Malware Insights

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

This PDF was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains numerous links to external websites, many hosted on compromised or disposable domains, suggesting a phishing or malware distribution campaign. The presence of embedded URLs and the nature of the heuristics indicate the file is likely intended to exploit vulnerabilities or trick users into visiting malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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://garglob.ru/uplcv?utm_term=medical+termination+pdf PDF link annotation
    • http://debandhelder.nl/ckfinder/userfiles/files/wepatobopekidubulizosu.pdfIn PDF document text
    • http://smenergy.kr/uploaded/file/94944699961171a4479cac.pdfIn PDF document text
    • http://ontheedgeofnow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160769cbca2d67---11158254536.pdfIn PDF document text
    • https://stgeorgedentalcare.in/ckfinder/userfiles/files/vuzarabaxunebudebapi.pdfIn PDF document text
    • http://bagandpack.ru/wp-content/plugins/super-forms/uploads/php/files/a784d543a49025767e5aaaf9f27f1848/34505515587.pdfIn PDF document text
    • http://www.klimavill.com//data/editorfile/4039839942.pdfIn PDF document text
    • http://sushinamu.com/uploads/files/19959751192.pdfIn PDF document text
    • http://casavacanzesanvito.eu/userfiles/files/45408807713.pdfIn PDF document text
    • http://www.bewegeninarnhem.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a541b4ad82a---7292918284.pdfIn PDF document text
    • https://aquamedicasatumare.ro/ckfinder/userfiles/files/69593522693.pdfIn PDF document text
    • https://www.pal-kont.hu/wp-content/plugins/super-forms/uploads/php/files/8e5d3b582ae0ea3bf0fd0d9019cb6597/worijudujumagukodito.pdfIn PDF document text
    • https://agilitynd.com/wp-content/plugins/super-forms/uploads/php/files/28c77e4fc049737d13714f24353091fd/33537891498.pdfIn PDF document text
    • http://fukaofoods.tw/uploads/files/202109041147151191.pdfIn PDF document text
    • https://envomask.com/wp-content/plugins/super-forms/uploads/php/files/23b3dd727fc68fb88a9b3626e9e24ef4/ramilezoximezi.pdfIn PDF document text
    • http://maidichike.com/upload/files/zagifor.pdfIn PDF document text
    • http://almar-bus.pl/userfiles/file/watemebajel.pdfIn PDF document text
    • https://sg-design.top/wp-content/plugins/super-forms/uploads/php/files/f2d073ef4178c333a11be9ac85e19e37/jerabapuv.pdfIn PDF document text
    • http://chinahongji.com/d/files/58075786785.pdfIn PDF document text
    • https://www.hospedeagora.com.br/wp-content/plugins/super-forms/uploads/php/files/sus1f1m1js288saues117qgcp8/wukorogezuzorabiwo.pdfIn PDF document text
    • http://adacu.org/userfiles/file/20210725195221.pdfIn PDF document text
    • http://for-rent-antwerp.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bc677bafc40---jitonorixazirukozijof.pdfIn PDF document text
    • http://theartofdesign.nl/ckfinder/userfiles/files/vuposagajutizeraremevurod.pdfIn PDF document text
    • http://reicar.dk/userfiles/file/675150773.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_off0000eb99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB99 18680 bytes
SHA-256: 6fa8d5a8b772798bca71535dc1a63f9e16c67f44c4ae8bc2dc9174b12c10c365
font_01_sfnt_off00011c6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C6A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013481.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13481 10608 bytes
SHA-256: 676ed81f87138551f906cbc8e0b81807ab38f1cc5c8f86033e3f7885d1bfed31

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