Malicious PDF — malware analysis report

Static analysis result for SHA-256 d08174ae4abd561d…

MALICIOUS

PDF

75.1 KB Created: 2021-08-30 10:55:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: cd97b91b4e2bc37fba2528da2cca2c4a SHA-1: 360ed3d6dca667643ae462fc2ad0b7acc1477856 SHA-256: d08174ae4abd561d334108438283bd20f519454cf4b0adbc09a8a03786be7c30
156 Risk Score

Malware Insights

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

The PDF document was identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, with numerous embedded URLs pointing to compromised CMS upload storage and disposable hosting. These links likely lead to further malicious content or phishing pages, aiming to trick users into downloading or interacting with harmful files.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 https://eghamatkade.com/basefile/eghamatkadecom/files/fibodetusunosiwokunilowej.pdf
    • https://manuscripthandler.com/userfiles/file/rowigukizalopeganeso.pdf
    • http://xecuoihuyhoang.com/uploads/userfiles/file/xerurofujupepexidodoxikok.pdf
    • https://sieuthimayphat.com/ckfinder/userfiles/files/duzulekix.pdf
    • http://countrysquirefoods.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072a2d084f2f---16246723379.pdf
    • https://nestaerospace.com/uploads/file/fefeful.pdf
    • https://zazilha.com.mx/wp-content/plugins/super-forms/uploads/php/files/d6d40654de72ad9b41eccc04f08381c9/rogorewikavebepogof.pdf
    • http://joshuadacosta.com/wp-content/plugins/formcraft/file-upload/server/content/files/160af6a71dd2a0---rapaliva.pdf
    • http://serendipityorlando.com/wp-content/plugins/formcraft/file-upload/server/content/files/16103bc9bbc225---55694976553.pdf
    • https://tlproduct.com/userfiles/file/78032258036.pdf
    • http://stopasbestos.ca/wp-content/plugins/formcraft/file-upload/server/content/files/161182abe02716---rekipuwogovebeximem.pdf
    • http://aksaaydinlatma.com/img/editor/image/file/kevilinodijagojurufez.pdf
    • http://www.1atlanticfunding.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ee3c21b33ba---67956509272.pdf
    • http://visualpaint.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077b890b46cd---zezewitogemenipes.pdf
    • https://www.inter-tube.co.uk/wp-content/plugins/super-forms/uploads/php/files/d5972e2a660a9ea63034af61f5ffdd46/reralivupotapufuzomuzafu.pdf
    • http://staging.impactredevelopment.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b5ef7a440b---jitevatorawuja.pdf
    • https://www.avenueroadadvertising.com/wp-content/plugins/formcraft/file-upload/server/content/files/160906af153703---ramiroporujixobokutoxozis.pdf
    • http://etenindex.nl/images/uploads/nofonomofegag.pdf
    • https://metroguards.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160c026911622d---65145981579.pdf
    • https://ewt.cz/res/file/zafebutuded.pdf
    • http://thehawthornnyc.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609cb30946013---50060204697.pdf
    • http://www.telsercom.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a508187854---xurukidivedupalaga.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/fzgW7-mxBc0/uplcv?utm_term=johnson+county+probation+office
    • 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_off0000c20b.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xC20B 16792 bytes
font_01_sfnt_off0000da22.bin
1ea120fde290e93843e272484561ebbdad8fd203c75d3d341ee11fbdd512af18
pdf-font-stream PDF embedded font (sfnt) at offset 0xDA22 10876 bytes
font_02_sfnt_off0000f314.bin
5e4cf98630a5110fb889fe4a600a6016bc5c4e0872cb41ad052f1c1d07d5d34d
pdf-font-stream PDF embedded font (sfnt) at offset 0xF314 16636 bytes