Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ec14c1504c1cc48…

MALICIOUS

PDF

78.9 KB Created: 2021-09-08 06:46:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 770136fadc4ad4cdbab0b30a81d65f04 SHA-1: 914cef0b0a427d42153154305a51defea5a2ba80 SHA-256: 0ec14c1504c1cc48b64711a11dcaedd3c57a3108242cf7620bca694662f175f3
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF document flagged by ML classifiers and ClamAV as malicious. It contains numerous links to external websites, many hosted on compromised WordPress installations, suggesting a link farm or phishing lure. The presence of external URIs and the overall structure indicate an attempt to redirect users to malicious content, likely for credential harvesting or further malware delivery.

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://catamma.ru/uplcv?utm_term=calculus+maximus+worksheet+2.7 PDF link annotation
    • http://www.sarajevo-inn-grunewald.com/wp-content/plugins/formcraft/file-upload/server/content/files/160718c956a0b8---neveguvumesebelovenuvu.pdfIn PDF document text
    • http://pvsystexperts.com/wp-content/plugins/super-forms/uploads/php/files/824ggi8t1qim4jjs6updfep733/xewufariziwikup.pdfIn PDF document text
    • http://conwaychristian.org/wp-content/plugins/formcraft/file-upload/server/content/files/1610300f3dd996---rewiputegaferulilogemat.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/160853df0bd27b---tanuteramipewanoxomut.pdfIn PDF document text
    • http://geometrarontani.it/userfiles/files/fokel.pdfIn PDF document text
    • http://americansemitruckparts.com/d/files/ditovazawuga.pdfIn PDF document text
    • http://sl-light.ru/design/img/upload/file/71489896034.pdfIn PDF document text
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/160f624d70e048---3265505786.pdfIn PDF document text
    • http://amoy-art.com/Upload/file/65040817650.pdfIn PDF document text
    • http://ocean-ex.com/images/blog/file/mibasodorisupogowazanosen.pdfIn PDF document text
    • http://iccarrentals.com/files/file/nexonixapedogifovelox.pdfIn PDF document text
    • https://sgdivorcelawyers.com/wp-content/plugins/super-forms/uploads/php/files/49236171338f5e324eead5cd05e0f5cf/41533369477.pdfIn PDF document text
    • https://cicadit.ro/UserFiles/file/livajexowakisatemobogatiz.pdfIn PDF document text
    • http://bitite.lv/media/txt/122/file/21961107847.pdfIn PDF document text
    • https://www.lowdoc-loans.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160b78962d288f---99985982022.pdfIn PDF document text
    • https://masterpieces-mallorca.com/wp-content/plugins/super-forms/uploads/php/files/7fd52105d79f4ee83f0dbd6895bc6dff/98415624470.pdfIn PDF document text
    • http://hondasushi.com/uploads/files/motisipo.pdfIn PDF document text
    • https://autoparkalbanese.it/file/67067549799.pdfIn PDF document text
    • http://asupuro.com/user_data/image//file/setesesiworesu.pdfIn PDF document text
    • http://www.primalegal.eu/wp-content/plugins/super-forms/uploads/php/files/r7ik68nk2b1e66ns5ab1e3kv61/12283905493.pdfIn PDF document text
    • http://www.videocopilot.net/assets/public/ckfinder/userfiles/files/vozipeluwivol.pdfIn PDF document text
    • https://jeanmarcrobion.fr/userfiles/file/kovosatupomijewupolukija.pdfIn PDF document text
    • http://www.bandungmesin.com/file/44528278734.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_off0000cffa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFFA 11036 bytes
SHA-256: 2518e9cc5890cd1e01b98c2c87683772825152490453e0c5556f135288cc8dfa
font_01_sfnt_off0000e9dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9DC 16992 bytes
SHA-256: 98e8fbf810bdbfbee8ff3e943461fefd93f481ccba873eec7a7eb6f4e6475f39
font_02_sfnt_off000115f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115F8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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