Malicious PDF — malware analysis report

Static analysis result for SHA-256 08fe2c4b833ea904…

MALICIOUS

PDF

89.3 KB Created: 2021-06-30 04:20:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 70c4b25e433695e5872fad99ffc335d8 SHA-1: 5e5bd7abfc4a115db6229e161d9c8604d721442b SHA-256: 08fe2c4b833ea90456e91907960238c4e542f9f0db45dda3e1f36e2c7bb1c83a
156 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics reveal that the document contains a link farm pointing to compromised WordPress upload storage, suggesting a phishing or malware distribution scheme. The embedded URLs are designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://verkoop-je-wagen.be/wp-content/plugins/formcraft/file-upload/server/content/files/160a4cdf57072a---jirasajuzasurapilazub.pdf
    • http://nowator-zpu.pl/userfiles/file/wepidezijejexagus.pdf
    • http://rilta.net/userfiles/files/3926972527.pdf
    • https://wcdt.co.th/wp-content/plugins/super-forms/uploads/php/files/61t5t5f5l522ttbngpa9fipdk5/94372698597.pdf
    • http://www.gametimecatering.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a3bd9cf76a---puropabiwigabewosigu.pdf
    • https://personalloan2u.com/wp-content/plugins/super-forms/uploads/php/files/1f08a9563df09e3d357cce0c0f02f53e/gotazoxiwaxategexisakanal.pdf
    • http://www.adanakursmerkezi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608703d52d127---lununubimodojogad.pdf
    • http://perfectthesale.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071a1b900589---43919060290.pdf
    • http://www.segurosfacility.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a70f23c2abb---puromijezekufutobofubaxed.pdf
    • https://asigurareingermania.ro/wp-content/plugins/super-forms/uploads/php/files/2b4cm7sm722i0pgs4vf352q9rp/56402524616.pdf
    • https://neoville.ru/wp-content/plugins/super-forms/uploads/php/files/62877552fa55c53ff1d1c53e0e24111d/woxarijejutux.pdf
    • https://socialchangefactory.org/wp-content/plugins/super-forms/uploads/php/files/eb792d21d0f4dcac43f5611be77eb32f/pevedozezuguwoxixoj.pdf
    • http://thefutureofgolf.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160c610d2c640f---xupiwirixugosizawad.pdf
    • https://topclassgreenery.nl/images/file/69899569807.pdf
    • https://xn----9sbccjdbca7cyaieg1a3j.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/8c1d40eefef75026b164ab34193de5c1/64907592106.pdf
    • http://polskienarty.pl/data/aktualnosci_imgs/file/desif.pdf
    • https://esz.jp/img/editor/files/labudip.pdf
    • https://ludifrance.fr/userfiles/file/39411026926.pdf
    • https://utilitydiscount.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a1853cc69f1---85143894615.pdf
    • http://www.verneteco.com/ckfinder/userfiles/files/segavuwi.pdf
    • http://incomsistema.ru/ckfinder/userfiles/files/28651337378.pdf
    • https://lsp.od.ua/wp-content/plugins/super-forms/uploads/php/files/e4jb9e9mtpoi7im43jgd6192v6/7274779361.pdf
    • https://jfefood.com/wp-content/plugins/super-forms/uploads/php/files/d08936b971312a74d71751929af7d1ec/monexejazatupezik.pdf
    • https://travelselection.us/wp-content/plugins/formcraft/file-upload/server/content/files/160c9f8969e564---88688994881.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=coccidiosis+in+cattle
    • 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_off0000fc6c.bin
dcd02ab48e76630a3a09883311a3f69aa757844fad1a1ed5f6a9094a878450e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xFC6C 10292 bytes
font_01_sfnt_off000113b8.bin
c3322aee1563b80543974d1495d263a575d82ba418cba1a2be249e8eba26689c
pdf-font-stream PDF embedded font (sfnt) at offset 0x113B8 17116 bytes
font_02_sfnt_off00013fca.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x13FCA 16792 bytes