Malicious PDF — malware analysis report

Static analysis result for SHA-256 dacaac7271937fcc…

MALICIOUS

PDF

69.3 KB Created: 2021-09-18 10:13:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: b0162365f556d49ebf94104d99dd0913 SHA-1: f3f114b5e5af8117043be302d4af721b6fac1489 SHA-256: dacaac7271937fcc59ce9ef4c37ebe52845c94ed62a87e9009b3eab119ef75f8
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 WordPress sites or disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware delivery. The file's structure and URL patterns are consistent with a malicious PDF used as a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

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 https://garglob.ru/uplcv?utm_term=bengali+full+film PDF link annotation
    • https://trichynext.com/wp-content/plugins/super-forms/uploads/php/files/5ccedb9092a03231b16eff1a4823fbc0/fuxaxower.pdfIn PDF document text
    • https://jagamimpi.com/contents/files/giziratibokipanikekaviwif.pdfIn PDF document text
    • http://fatfailogistics.com/fckeditor/files/file/zidasawon.pdfIn PDF document text
    • https://swapnauraan.com/ckfinder/userfiles/files/46860647103.pdfIn PDF document text
    • http://immobilieninvestors.net/userfiles/file/rafof.pdfIn PDF document text
    • https://acrgroup.nl/userfiles/file/waxadi.pdfIn PDF document text
    • http://sinosteelcode.com/filespath/files/20210908214836.pdfIn PDF document text
    • https://www.campacinter.com/image/upload/File/xotesekulufawurid.pdfIn PDF document text
    • https://ww150001.linebot.net/upfile/files/20210902031900.pdfIn PDF document text
    • http://kibbkw.com/uploads/file/5341262288.pdfIn PDF document text
    • https://mma-montessori.com/admin/ckfinder/userfiles/files/mugonewoxusida.pdfIn PDF document text
    • http://www.deadclan.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1613c863e20ff3---zalirepikewuxurigajaluv.pdfIn PDF document text
    • http://www.tamtrebinhminh.com/public/files/22962966132.pdfIn PDF document text
    • http://poney-club-romilly-aigre28.fr/userfiles/file/keliwitira.pdfIn PDF document text
    • https://birsamundapark.in/userfiles/files/68247993208.pdfIn PDF document text
    • http://xn--zb0bw3kv4s8mn.com/upload/fckeditor/file/34769417333.pdfIn PDF document text
    • http://7sate.com/filespath/files/20210906215415.pdfIn PDF document text
    • http://queuemanagementsystems.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613030ad1d9e6---bidez.pdfIn PDF document text
    • http://xn--80aadcnaeutgftohcogh8i8dsc.xn--p1ai/pict/file/85776689450.pdfIn PDF document text
    • https://cbolean.com/wp-content/plugins/super-forms/uploads/php/files/9a40ca1b63116ae73d5163668661f828/11239996727.pdfIn PDF document text
    • https://vrindaindia.com/php/joseph/uploads/file/90528651862.pdfIn PDF document text
    • http://bluecars.pl/userfiles/file/gakuzi.pdfIn PDF document text
    • 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_off0000b260.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB260 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ca72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA72 15352 bytes
SHA-256: a9ed92f9e04e99a3280cf2af681fc34d2747ecf14dda9bf2648610d9e51cbe6f
font_02_sfnt_off0000f17c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF17C 10224 bytes
SHA-256: eb855118cf0ed181deb9d643ae7813746db661e8ab968b8cf99d9e610b0c20ef