Malicious PDF — malware analysis report

Static analysis result for SHA-256 c07fd75a1a207407…

MALICIOUS

PDF

78.7 KB Created: 2021-08-11 06:34:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 24090cb0a003108164cffa774ab4cf9e SHA-1: 65510d9cad53325399d45fe1527f18e8360a9c60 SHA-256: c07fd75a1a2074076468d9f35d07dc645c052d9bdf0fba8f7efc06821d4d05e4
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to compromised CMS uploads and disposable hosting, indicating a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with techniques used to deliver second-stage payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9911

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://woonhuislift.info/wp-content/plugins/formcraft/file-upload/server/content/files/1610664fee0c3e---zogofebi.pdf In PDF document text
    • https://mygoaltv.com/ipp/images/uploads/files/zikapufasirusig.pdfIn PDF document text
    • http://waypl.pl/upload/File/80340869543.pdfIn PDF document text
    • http://frederickfollows.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160f62d3795905---zemadubiji.pdfIn PDF document text
    • http://tea-ra.com/user_data/upload/save_image/files/lizezinajufuwidupojovaxog.pdfIn PDF document text
    • http://finsura-lifedirect.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160871f014ae90---2107992116.pdfIn PDF document text
    • https://www.lokalesichtbarkeit.de/wp-content/plugins/super-forms/uploads/php/files/3rgbvlh7qnnra4j6kts0n64pvj/bowizeximapejiz.pdfIn PDF document text
    • https://pankalconstructora.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d3f8830edaa---74767271378.pdfIn PDF document text
    • http://mfplus.ba/wp-content/plugins/formcraft/file-upload/server/content/files/1610476a70fc3a---jolazisodolijewivuxagefuw.pdfIn PDF document text
    • https://www.growxponential.com/wp-content/plugins/super-forms/uploads/php/files/t5ahfmg3geb6ni9cd8dtkrudbk/16049059243.pdfIn PDF document text
    • https://washlounge.in/ckfinder/userfiles/files/rotum.pdfIn PDF document text
    • https://messianic.live/wp-content/plugins/super-forms/uploads/php/files/4dc9a17dd583ba863824f97d1baf9281/lemenukenot.pdfIn PDF document text
    • https://retentionstudentexperience.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c5a31f18555---91642407155.pdfIn PDF document text
    • https://biblioteka-koneck.pl/ckfinder/userfiles/files/97955020207.pdfIn PDF document text
    • http://leakefamilyreunion.com/clients/63964/File/tebudafe.pdfIn PDF document text
    • http://nail-free.com/ckfinder/userfiles/files/natepinulivoba.pdfIn PDF document text
    • http://divorcefinance.nl/uploads//file/jisedat.pdfIn PDF document text
    • http://www.chicagoalphas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607fbc70479b4---debukipimenasipirobokegil.pdfIn PDF document text
    • https://www.lindopoint.it/wp-content/plugins/super-forms/uploads/php/files/c66c56468a733637a2100368e752fd6b/ramiwadu.pdfIn PDF document text
    • http://sakirnoopo.ru/wp-content/plugins/super-forms/uploads/php/files/009377f1a9d3f52275beab9c78560b37/valudigifami.pdfIn PDF document text
    • http://www.segurosfacility.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16112e9fce4e06---dumulapudegokusaditor.pdfIn PDF document text
    • https://123kozijnofferte.nl/wp-content/plugins/super-forms/uploads/php/files/lgins5ljp41b9sfg52t8dm4gf0/puzavixiwojuzaduxajod.pdfIn PDF document text
    • http://udelimpa.es/ckfinder/userfiles/files/ruxabam.pdfIn PDF document text
    • https://dorfadvertising.com/ckfinder/userfiles/files/80824513121.pdfIn PDF document text
    • http://sciencevier.com/wp-content/plugins/formcraft/file-upload/server/content/files/160daf5da81e33---niwalofupenafifumim.pdfIn PDF document text
    • https://www.visitrwanda.com/wp-content/plugins/super-forms/uploads/php/files/d368ad86f720db094d961a5a4c613e6b/38599127220.pdfIn PDF document text
    • http://szyldkj.com/luodan/images/userfiles/file/sekexizujerovudez.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=chemistry+dimensional+analysis+worksheet+answer+keyPDF link annotation
    • 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_off0000d0c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0C8 16380 bytes
SHA-256: 006c605059b8e8ff02d72e4ea7af03e6c81f9f0635ec9695827504718bdd6b5a
font_01_sfnt_off0000fb62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB62 10836 bytes
SHA-256: 7dc72faa8baa2e9ee38e02af9cacbbd3cf6dd19c2dac4b4346fc7da4eaea25f8
font_02_sfnt_off0001144d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1144D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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