Malicious PDF — malware analysis report

Static analysis result for SHA-256 01af3c68067c282f…

MALICIOUS

PDF

85.7 KB Created: 2021-09-14 01:26:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: b9eb1e859e88df1bbfd3c4f2cad3971b SHA-1: c8715e67a7c9f70b0a1b8510dcd0879b180e508a SHA-256: 01af3c68067c282fb9c1abe387ae66407824fb58acb7aeb6b8be3a05aa530596
156 Risk Score

Malware Insights

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

The ML classifier and ClamAV detection strongly indicate maliciousness. The PDF contains a link farm pointing to compromised WordPress sites and disposable domains, a common tactic for phishing or distributing further malware. The presence of multiple external URIs and link farm heuristics supports this attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://www.isnb.co.uk/wp-content/plugins/super-forms/uploads/php/files/4c2fee4658e75781f53d6042db453e63/tilatikujilinep.pdf In PDF document text
    • https://ingatlanfelugyelet.hu/uploads/file/63095167301.pdfIn PDF document text
    • http://p-energo.ru/content/file/52544517058.pdfIn PDF document text
    • http://macabrey-luthier.fr/data/Files/faxegowosanebodarivotisoj.pdfIn PDF document text
    • https://textosl.com/upload/editor/file/48780316245.pdfIn PDF document text
    • http://antifftech.com/uploadfile/file///2021090410581016.pdfIn PDF document text
    • https://loskutova.site/wp-content/plugins/super-forms/uploads/php/files/3650714f4a3dd8c96200264eab1cf0c5/54765251297.pdfIn PDF document text
    • http://turatabor.hu/media/mipubamalobe.pdfIn PDF document text
    • http://meteosputnik.ru/userfiles/file/1455378454.pdfIn PDF document text
    • http://e-sportis.com/images/upload/dotipetozulaxaduladumazak.pdfIn PDF document text
    • https://kawanmto.org/contents/files/44275250178.pdfIn PDF document text
    • http://artwatch.ru/userfiles/file/sivosajixowuseja.pdfIn PDF document text
    • https://chetanaus.org/bheru/uploadfiles/file/81521215655.pdfIn PDF document text
    • http://agmapure.com/upload/files/4766974032.pdfIn PDF document text
    • http://singer-island-condos.com/userfiles/files/64422669270.pdfIn PDF document text
    • http://stadion-zarya.ru/ckfinder/userfiles/files/runanudemapal.pdfIn PDF document text
    • http://elcwma.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/niwokipuganenaruv.pdfIn PDF document text
    • http://rgn2u.com/userfiles/files/25925125710.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/161348fe71470d---kodukofatugegadavad.pdfIn PDF document text
    • http://lycee-elm.com/userfiles/file/jorilifa.pdfIn PDF document text
    • https://hotelristorantenovecento.it/wp-content/plugins/super-forms/uploads/php/files/a1f067128213f7668f012242d1d6cf22/35207959663.pdfIn PDF document text
    • https://eghamatyab.com/basefile/bainbookcom/files/rixefuporapidexogagonu.pdfIn PDF document text
    • https://www.sharpeningfactory.com/wp-content/plugins/formcraft/file-upload/server/content/files/16136cbb496e42---dikagobejolenefadewul.pdfIn PDF document text
    • http://princeverma.in/uploads/files/jovepogolumazela.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=tamagotchi+app+androidPDF link annotation
    • 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_off0000eaa2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAA2 18056 bytes
SHA-256: 3389ccd0e49f4fbe217278baebfafee4860055216575f313dab6c5cd8942b083
font_01_sfnt_off00011985.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11985 10576 bytes
SHA-256: dd39dc36e76d909c73494570ddcfff0dc1f73832e9c6efa01a8cdce49a2a7908
font_02_sfnt_off00013141.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13141 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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