Malicious PDF — malware analysis report

Static analysis result for SHA-256 a7fc36db2a360abf…

MALICIOUS

PDF

96.0 KB Created: 2021-06-25 12:38:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 4ab1372df85e5c22d552401c828aeb2f SHA-1: 164000e6c88410d430b0b6053e461a43fe9f9677 SHA-256: a7fc36db2a360abf244e5830283147937b07691b9c4c893755a7ece19dd18048
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which point to compromised WordPress sites or disposable hosting, suggesting a link farm or phishing lure. The ClamAV detection and ML classifier strongly indicate malicious intent, likely to redirect users to malicious content or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://synerhu.ru/uplcv?utm_term=therapeutic+classification+of+drugs+pdf
    • https://pfgmm.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16070207245567---kifimupubin.pdf
    • http://toanlinh.vn/upload/files/pupowuxukigekagelawajixow.pdf
    • http://127.0.0.1/bantraicay/js/ckfinder/userfiles/files/pemizijaripeg.pdf
    • http://lirealestatelitigator.com/wp-content/plugins/super-forms/uploads/php/files/348f6aa9c90d76f5d8ecb5a7c70bb340/31497854299.pdf
    • https://accesoriosalmayor.com/images/userfiles/file/gekerepogurubugebad.pdf
    • https://na-nule.ru/wp-content/plugins/super-forms/uploads/php/files/tsob80tiu5483n8hrcq58escs2/91474037088.pdf
    • https://deedpoll.sg/wp-content/plugins/super-forms/uploads/php/files/7bc7928095f3331ad2bcdcf0018bc1af/23418513364.pdf
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607df7425ec0f---83824137369.pdf
    • http://xn--80ackbssfuieecff0e8c.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/7e4jt608ku9j5p5qbrolsbhmo1/gogilikomowededovilisexi.pdf
    • http://kindervakantieweekdeurne.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160b3d0a70c454---93826183356.pdf
    • https://drvishweshwari.in/userfiles/file/popasiledulumanuriras.pdf
    • https://kalatranslation.co.uk/wp-content/plugins/super-forms/uploads/php/files/pgsl1j25f0cl4ippahmt4c9spb/jalosiwuwekilenunu.pdf
    • http://automsystem.com/UploadFile/file/20210624144527863.pdf
    • https://www.icslights.com/wp-content/plugins/super-forms/uploads/php/files/b19909f7d515fc95be509d9a2bb5f62c/netojerilejozidox.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_off00011460.bin
c8dfa6b6f3206eeeeee8cfcce16075c65d993fcabe062a60715146858dcc8df1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11460 17432 bytes
font_01_sfnt_off0001420c.bin
9ff15f1137e7ad029deb687f00cba2c5712fcbbacf76fbaafbb9223127f7f8f5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1420C 10960 bytes
font_02_sfnt_off00015b37.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15B37 16792 bytes

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