Malicious PDF — malware analysis report

Static analysis result for SHA-256 187ef9230c9c64a9…

MALICIOUS

PDF

88.4 KB Created: 2021-06-27 17:16:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 19354d3abdbde17a89315d0e197607c1 SHA-1: 512918a10dbc3b90ebed78eb407b21445c977195 SHA-256: 187ef9230c9c64a98e1496c68774fe4e10e57917687897e631bef6f6ae1c1233
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains a link farm with numerous URLs pointing to compromised WordPress sites, suggesting it is used to distribute further malware or redirect users to phishing sites. While no scripts were directly extracted, the structure and URL patterns are consistent with phishing or malware distribution campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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 http://conservationenergy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b0742af56f---fegovonulegosebuber.pdf
    • https://www.northernillumination.com/wp-content/plugins/super-forms/uploads/php/files/7da2b2da75e09d3e19cd9b85668b2df4/17973972483.pdf
    • https://mnlex.it/file/8203838446.pdf
    • http://alternativefitness.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160bc20f0e5660---fagawaluretu.pdf
    • https://autotrilogy.com/wp-content/plugins/super-forms/uploads/php/files/c22aa3f908dd581bf65b47f42d06b6ea/borototafowatej.pdf
    • https://www.kunapak.com/wp-content/plugins/super-forms/uploads/php/files/d0r9bpqgddghp9298m9ms4k2jm/10799307177.pdf
    • https://kodcomputers.ro/2664/uploads/nugokulafogediradogap.pdf
    • https://heykidsletscook.info/wp-content/plugins/super-forms/uploads/php/files/bc505992fe9175a8d0d7e9a79e3fee90/17624623197.pdf
    • https://www.kadinlarsitesi.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a5433203c6e---vivode.pdf
    • http://caratow.eu/userfiles/file/babepowu.pdf
    • http://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c85a67ef8e6---79973986880.pdf
    • https://www.karenlovelee.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8caae6d2a5---xuvatirejoxit.pdf
    • http://apexibd.com/uploads/fck_uploads/file/94070714564.pdf
    • https://pavaniautismschools.com/wp-content/plugins/super-forms/uploads/php/files/ji7a6suvpl256trb0g8j2hn821/25713277492.pdf
    • https://choiceenergynetwork.com/wp-content/plugins/super-forms/uploads/php/files/60e102fd56a8dbffd734a399d08508a6/89002965409.pdf
    • https://enville.com/wp-content/plugins/formcraft/file-upload/server/content/files/160908566d5e2f---3548695225.pdf
    • https://www.modianodesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608770f351ecc---73938460386.pdf
    • http://bundoreh.com/fckeditor/files/file/4280437453.pdf
    • https://www.helpagesl.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609eb052b438d---58999274283.pdf
    • http://admio.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1606c9757496d9---42716335652.pdf
    • https://xn----8sbaavnccwq4am.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/61e82a5711c295901d9817ce660baec9/44611023842.pdf
    • http://ge-mak.com/files/mewupa.pdf
    • https://deewo.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606f4cdc8064b---xurigidakonusavaf.pdf
    • https://www.modianodesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bb482d1c075---20880544437.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=touch+football+training+drills
    • 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_off0000f296.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xF296 16792 bytes
font_01_sfnt_off00010aad.bin
fdd911c274ce2ec264e341b5f74e5457e020c02e6feed64130a2919714019e93
pdf-font-stream PDF embedded font (sfnt) at offset 0x10AAD 10828 bytes
font_02_sfnt_off0001235f.bin
95a818d77e7998d71e3ba9b11e2f39d1b83aeba79c55cb8fe4480ebd8dbbc857
pdf-font-stream PDF embedded font (sfnt) at offset 0x1235F 18024 bytes