Malicious PDF — malware analysis report

Static analysis result for SHA-256 60ef19eef764f37d…

MALICIOUS

PDF

73.7 KB Created: 2021-06-11 16:28:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 7baa697b88c5c132d81fd701f317272a SHA-1: 1ae49e031e2c5ea6037c58e84bc024aef44a4bf0 SHA-256: 60ef19eef764f37d8a1898ce89fa79588077a58a836ded399ae70070c91bd8ee
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains numerous embedded links, many of which point to compromised WordPress upload directories. The presence of a UTM term in one URL suggests a phishing or SEO poisoning attempt to drive traffic to potentially malicious content. ClamAV and ML classifiers also flagged this PDF as malicious, indicating a high likelihood of phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9744

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
  • PDF differential parser failed info PDF_DIFFERENTIAL_PARSE_FAILED
    The cross-check parser (pdfminer.six) failed on this file: PDF differential parser failed: PDFSyntaxError. Static heuristics still ran and any of their findings above are valid; only the differential cross-check signal is missing.
  • 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://huntic.ru/uplcv?utm_term=the+division+2+cheats+pc PDF link annotation
    • http://makaeximworld.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083ba007878d---64891856695.pdfIn PDF document text
    • http://www.zulfugar.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607f35b48a2c4---61627706786.pdfIn PDF document text
    • https://rmissio.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1607befbe76628---nipalilivururi.pdfIn PDF document text
    • https://wscnaturalhealings.com/wp-content/plugins/super-forms/uploads/php/files/3a7a63fc35f87e1b9a53f6e773eb0639/kawiroj.pdfIn PDF document text
    • https://izharfoster.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ac8b6c0759---30357578802.pdfIn PDF document text
    • http://dianacb.cz/userfiles/file/jutazusadiwovadomojin.pdfIn PDF document text
    • https://enville.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093e45c7c248---23470749554.pdfIn PDF document text
    • http://www.carolglassman.com/wp-content/plugins/formcraft/file-upload/server/content/files/160708867a5032---tujubimedatufunatoni.pdfIn PDF document text
    • http://dakmet.pl/upload/50772730534.pdfIn PDF document text
    • http://test.uebersetzungen-nesselberger.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608f781d4db0a---vuvikevexarog.pdfIn PDF document text
    • http://www.appsolutely.sg/wp-content/plugins/formcraft/file-upload/server/content/files/16090f9ffd6d56---zosatabesetege.pdfIn PDF document text
    • https://espaciocultivarte.com/ckfinder/userfiles/files/vinejuwenepejizukijeta.pdfIn PDF document text
    • http://www.myhhsi.com/wp-content/plugins/super-forms/uploads/php/files/f056df942726ad89f88f1eceb63ce643/megarit.pdfIn PDF document text
    • https://master.plus/wp-content/plugins/super-forms/uploads/php/files/a77f2537d16bf10d0a059d0655b173ac/tutovexisofifuwerejuxilit.pdfIn PDF document text
    • https://www.alignerco.ca/wp-content/plugins/super-forms/uploads/php/files/de7bc7f540bc84a1431a6ad456ad589d/55115285891.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ee8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE8A 5176 bytes
SHA-256: fe055ca0a08a2a81c99f5d32e4bf83fc54295bd7c430a5f4580d502e59c3cae3
font_01_sfnt_off00010030.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10030 10848 bytes
SHA-256: 9aca2ec1cbe437d0bfae2ad33e44b17a01d6f2afd50a0e04e062c7283802ddee

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