Malicious PDF — malware analysis report

Static analysis result for SHA-256 a95875d9056c842e…

MALICIOUS

PDF

84.2 KB Created: 2021-06-30 10:15:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 7a7a4948e1c4230777a2c077ac35b7b7 SHA-1: 18835db23fbcec8074bb214907c29be546ebbee6 SHA-256: a95875d9056c842e2b8f4212dffe71074420748664b3454f1e6a2c077d2489ce
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous embedded URLs, many of which point to compromised or disposable hosting domains, suggesting a phishing or malicious redirection attempt. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution via these links. The document body is heavily obfuscated and unreadable, providing no direct content clues.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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://www.belladermeestetica.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160988e1e3f6b6---dumibanalizifetoxabuf.pdf
    • http://tokyoto.pl/UserFiles/file/guxidejapavo.pdf
    • http://euredit-editions.com/userfiles/file/gawekulovowafores.pdf
    • http://drstevealbrecht.com/wp-content/plugins/super-forms/uploads/php/files/f55a4ae168adc7e93f64233ec2e8ea83/17151187402.pdf
    • http://paymentsbusiness.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607fe08c58c4a---xazuwikewogalijex.pdf
    • https://comfortinnbarrie.com/phpsites/vertical_living/uploads/file/24437984545.pdf
    • http://ziepniekkalns.lv/wp-content/plugins/formcraft/file-upload/server/content/files/160772527df809---16453191611.pdf
    • http://aircond.md/upload_fck/file/dimizofodozugewixijop.pdf
    • https://engineeredrepinc.com/wp-content/plugins/super-forms/uploads/php/files/00294700c8b42fdad6e345dfb63518c2/loxovevamesi.pdf
    • https://zzarosiscarampola.it/file/vobikimibarituvukenag.pdf
    • https://www.chinacimctrailer.com/wp-content/plugins/super-forms/uploads/php/files/aa53de60ba998d65c92041a24c7bdfae/vazebakapa.pdf
    • http://sghscsjamarai.org/guruhargobind/userfiles/file/kilesotir.pdf
    • https://alcc.vn/wp-content/plugins/super-forms/uploads/php/files/k9s73h5ioflmrchqhmto4l7sn8/10239196033.pdf
    • https://dailyhondaotomientay.com/upload/files/dukukodisurovepafinijuwin.pdf
    • https://divorcioconsensual.com.br/wp-content/plugins/super-forms/uploads/php/files/83cc960a5b10b2bc642986bb0f401dc8/90345145617.pdf
    • https://www.allterra.group/wp-content/plugins/super-forms/uploads/php/files/563bc38da12f393f83a4b38d6a34e1a9/firukitexubemix.pdf
    • http://saga.diamonds/uploads/ckfinder/files/16258921512.pdf
    • http://vipavtoufa.ru/wp-content/plugins/super-forms/uploads/php/files/ee7f0e1ca0e2991f836524a65223b58b/fuzanirejukonadememezapef.pdf
    • http://burelomdo.com/ckfinder/userfiles/files/zolamokufabuvapi.pdf
    • http://kassa.pl/userfiles/file/ziwopano.pdf
    • https://3dreamstudios.com/wp-content/plugins/super-forms/uploads/php/files/32c43f419b0cdfd4f6a8b1acfb24828e/pajugitadedetikijipegug.pdf
    • http://emilygrilltogo.com/uploads/files/35037920227.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=matlab+code+for+newton+divided+difference+interpolation
    • 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_off0000e590.bin
10a905d4ba1e2cdf324d22dfea291bb4ed5a4391d83b1b590227203e2c3bf148
pdf-font-stream PDF embedded font (sfnt) at offset 0xE590 17168 bytes
font_01_sfnt_off0001128f.bin
928e9d2035f17c2154da7606f56e881e0bea920c466900fdb4812ec84cf3e6d6
pdf-font-stream PDF embedded font (sfnt) at offset 0x1128F 10732 bytes
font_02_sfnt_off00012b32.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x12B32 16792 bytes