Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b42e4cc43d65200…

MALICIOUS

PDF

87.8 KB Created: 2021-09-01 13:25:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: d73331812c6a6d4c1c177d10ff4f2a62 SHA-1: 2a5b5cfd8a37572169a6439bc6ef64f0eeff2fc8 SHA-256: 2b42e4cc43d652007aa86c3554ccd1959e18b2522442cae457450adf49f34238
164 Risk Score

Malware Insights

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

The PDF document contains numerous external URIs and is flagged as a link farm, with many links pointing to compromised WordPress upload directories. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The document body is heavily obfuscated and unreadable, providing no direct content-based clues.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

Heuristics 7

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://wastran.ru/uplcv?utm_term=sociology+net+questions+and+answers PDF link annotation
    • http://www.majoriscambio.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a0532e7e119---36838213293.pdfIn PDF document text
    • http://bachtungcompany.com/upload/files/77998100870.pdfIn PDF document text
    • https://kindliving.org/wp-content/plugins/super-forms/uploads/php/files/tmp/kupapuwafukonidu.pdfIn PDF document text
    • http://nek.ua/wp-content/plugins/formcraft/file-upload/server/content/files/160c35e600a798---wuwebi.pdfIn PDF document text
    • https://whitelightdesign.com/wp-content/plugins/super-forms/uploads/php/files/eb24759df98896726b281e434fb5fb32/65609542103.pdfIn PDF document text
    • https://www.federatedlighting.com/wp-content/plugins/super-forms/uploads/php/files/8b280a409681ba84dc73527ffba1282c/16521620328.pdfIn PDF document text
    • http://isystemlab.com/admin/ckfinder/userfiles/files/72926303004.pdfIn PDF document text
    • http://www.photobreak.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c2866686851---pefarosopuwidoteju.pdfIn PDF document text
    • http://upoart.com/ckfinder/userfiles/files/tadowisabazejaxawiser.pdfIn PDF document text
    • https://agrilaui.com/userfiles/file/pomatamonedubozinepoj.pdfIn PDF document text
    • https://antoinepanau.com/wp-content/plugins/super-forms/uploads/php/files/fbde7b0f72141b5d19f36c32cec772f1/zumimupofupewapokuxini.pdfIn PDF document text
    • http://demirlermetal.com/resimler/files/menasetoxujata.pdfIn PDF document text
    • https://regenerativetherapyforpain.com/wp-content/plugins/super-forms/uploads/php/files/73f6998c59bbd05c8a74c80d4ad37f06/77057663223.pdfIn PDF document text
    • http://smartmedicaleg.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f4fa76bf62---sififufofoguwi.pdfIn PDF document text
    • http://www.thediethub.in/wp-content/plugins/formcraft/file-upload/server/content/files/160b3ccad2262a---gekedibemijeregubabep.pdfIn PDF document text
    • http://helderlive.nl/ckfinder/userfiles/files/xagububepivagi.pdfIn PDF document text
    • http://www.bridalchapel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c582eb4db3a---xetotezesixuxatapuke.pdfIn PDF document text
    • http://pronobile.de/catalog/file/vagutamuzukozenix.pdfIn PDF document text
    • http://szentdorottyapatika.hu/files/89060207652.pdfIn PDF document text
    • http://www.dawnrotaryclub.tw/UserFiles/files/sidejolomowisizivi.pdfIn PDF document text
    • http://prograsifkalip.com/files/mesudoworodadifapamidumek.pdfIn PDF document text
    • https://terravistahometeam.com/wp-content/plugins/super-forms/uploads/php/files/b0af889b489db941f970cf7ea30173cc/5048306029.pdfIn PDF document text
    • http://falconltd.pl/cache/file/85524045531.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_off0000f000.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF000 11064 bytes
SHA-256: 91ca016319eab0a63b1105dc6483234f9cabb51512d1efc7f30e69d48e52ab77
font_01_sfnt_off00010974.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10974 18060 bytes
SHA-256: d5810ebb2a002f3e8320f70e0a46383115b94c55ec277bd28e0e09a0939bb80f
font_02_sfnt_off0001387b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1387B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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