Malicious PDF — malware analysis report

Static analysis result for SHA-256 bbcb2f2a03a01a4f…

MALICIOUS

PDF

113.9 KB Created: 2021-09-07 23:00:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 2fba1235fb103a34efc1a9c996e1c77d SHA-1: bae5e343c66289879f2124ebc85e65cb0bcb9a87 SHA-256: bbcb2f2a03a01a4f62b4f21247feaa47b2762067a9d1eaf9806fb222d6f0a824
156 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Numerous embedded URLs point to compromised WordPress sites and other domains, suggesting a link farm designed to redirect users to malicious content. The PDF structure and link farm characteristics are consistent with phishing or malware distribution campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://irlanc.ru/uplcv?utm_term=sublingual+tablets+formulation+pdf PDF link annotation
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/161153c9e23e72---vabumufewalukopevadaw.pdfIn PDF document text
    • https://www.alpha-dynamics.gr/wp-content/plugins/formcraft/file-upload/server/content/files/16082ce9b14570---kelikovavup.pdfIn PDF document text
    • https://atcotourismtravel.com/userfiles/file/gorozuxoselazex.pdfIn PDF document text
    • https://lakeshoresmilesdentistry.com/wp-content/plugins/super-forms/uploads/php/files/tklpq4feu6r89vnlm3kmc5tbc1/rutapozugigosuparixe.pdfIn PDF document text
    • https://acrgroup.nl/userfiles/file/tugunobisosuloronozex.pdfIn PDF document text
    • https://cls-toronto.com/wp-content/plugins/super-forms/uploads/php/files/bf7e819e9b4887edfbd6809facd64ce4/33941213159.pdfIn PDF document text
    • http://altus.pl/userfiles/file/jukusedogima.pdfIn PDF document text
    • http://myhomeinparis.com/userfiles/files/savuzexevogenigupasurufoj.pdfIn PDF document text
    • https://www.goldenplanet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/16079683d7e3eb---9328142680.pdfIn PDF document text
    • https://0800-707-808.com/upload/ckfinder_temp/files/20210816172129.pdfIn PDF document text
    • https://www.vibrationmonitoring.asia/wp-content/plugins/formcraft/file-upload/server/content/files/160a5e48379d39---54987452581.pdfIn PDF document text
    • https://aquaprosmart.com/userfiles/files/19937741119.pdfIn PDF document text
    • http://dulichtantai.com/files/uploaded/files/xobepozibafubavu.pdfIn PDF document text
    • https://korzayithalat.com/spot/admin/fckeditor/userfiles/file/nilakeganevuzunakol.pdfIn PDF document text
    • https://jennysbooks.com/wp-content/plugins/super-forms/uploads/php/files/3133acc313dd95e5f7d0abe33f72cad4/78070697617.pdfIn PDF document text
    • https://saunadlaciebie.pl/userfiles/file/midedisowejimudejo.pdfIn PDF document text
    • http://ipvoicenj.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b0f541309e6---guzexamuwobasut.pdfIn PDF document text
    • http://e-sheremet.com/img/xowulisegufu.pdfIn PDF document text
    • http://gpe-el.pro/ckfinder/userfiles/files/nozaruxivajodexufex.pdfIn PDF document text
    • https://nasikampung.info/contents//files/fagofezukizuwurebes.pdfIn PDF document text
    • http://qianxish.com/ckfind_image/files/xetexumivewitejuzerere.pdfIn PDF document text
    • https://topclassgreenery.nl/images/file/63400264080.pdfIn PDF document text
    • https://yastudio.net/wp-content/plugins/super-forms/uploads/php/files/5d736e2f6922e57c92eddf23fee3adcd/78700087705.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_off00015463.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15463 11156 bytes
SHA-256: 54e40658bc4071f2ed046a268f0ecb503312fefd1ba0f97e8830d086c9bec540
font_01_sfnt_off00016e03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16E03 19484 bytes
SHA-256: 6f82a31bc86a99341a875f2f71badcb3285da9aa319537add383d86963a28511
font_02_sfnt_off0001a191.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A191 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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