Malicious PDF — malware analysis report

Static analysis result for SHA-256 fcc512a595fac9c6…

MALICIOUS

PDF

69.9 KB Created: 2021-09-27 06:55:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: fcc2a676b80ec2ff02b1307642fc0a25 SHA-1: 83e1de48115b2f9c5c9a79435cf4d5ff8287882d SHA-256: fcc512a595fac9c66c4dafca412fabdef4f6a8705440d08d1053ac0fdd949e24
176 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to multiple compromised websites, a common tactic for distributing malware or conducting phishing. The ML classifier and ClamAV detection strongly indicate malicious intent. The presence of numerous links on disposable hosting and compromised CMS uploads further supports a malicious campaign, likely aiming to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9950

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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://swotin.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614d0159c409d---bedadizawuk.pdf
    • http://polletnv.be/uploads/files/feraxufumunegomusinika.pdf
    • http://caythuocdangian.net/images/files/48245918155.pdf
    • http://nsk-nalogov.net/upload/files/vususu.pdf
    • http://www.linkkorea.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/161492f9215190---totomuf.pdf
    • http://danchrisjewelry.com/userfiles/file/vapudupuvifijurexiz.pdf
    • https://www.blackandwhite-salon.com/wp-content/plugins/super-forms/uploads/php/files/tmp/59018559437.pdf
    • http://okna-dvere-online.cz/media/upload/upload/file/kejasevoxunu.pdf
    • https://mcq-exambd.bdbabymart.com/app/webroot/ckfinder/userfiles/files/2320603352.pdf
    • http://cc-loges.com/uploads/file/14744072330.pdf
    • https://drmiamiconnect.com/wp-content/plugins/super-forms/uploads/php/files/0a17b25c07feea035fa3731af1a5d132/36612257652.pdf
    • https://558com.vegner.com/userfiles/files/20210916_122332.pdf
    • https://sweetburden.com/upload/users/files/8526143161.pdf
    • http://raffaelecavazzoni.com/userfiles/files/84972433044.pdf
    • http://spl-designs.com/ckfinder/userfiles/files/sodapowenuzawawegemap.pdf
    • https://tpk-m.ru/files/file/mofesunebira.pdf
    • http://business-plan-capalpha.eu/mbp/upload/images/images/upload/ckfinder/42259625329.pdf
    • http://sooclose.eu/upload/File/detiwugolafoxewefi.pdf
    • https://stpetejazz.com/wp-content/plugins/super-forms/uploads/php/files/qd4kk0ll649h9hcbujo4hqkmce/89091198229.pdf
    • http://szigmetal.hu/editor_up/13770711749.pdf
    • https://www.funes.gob.ar/ckfinder/userfiles/files/58704943720.pdf
    • http://lamgi.pl/ckfinder/userfiles/files/22805251546.pdf
    • http://zjnep.com/ckeditor/ckfinder/userfiles/files/85350547035.pdf
    • https://patidarpalanpur.com/web/k/main_admin/ckfinder/userfiles/files/naxakaw.pdf
    • https://sumangold.net.vn/wp-content/plugins/super-forms/uploads/php/files/ubdv3rk8f4gssqv2pp2joaat9s/25643980428.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=ignite+me+read+online+free
    • 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_off0000b0b2.bin
44c5fc803d7c60d16be3cd1236690847321d919e068df2878c311b2e15c2f385
pdf-font-stream PDF embedded font (sfnt) at offset 0xB0B2 16224 bytes
font_01_sfnt_off0000d8f1.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xD8F1 16792 bytes
font_02_sfnt_off0000f108.bin
1505c2479fcbff21c8bef1bd22d99823e4957ca1fad005b8d1543d9fd8bc760e
pdf-font-stream PDF embedded font (sfnt) at offset 0xF108 10480 bytes