Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd6d1ccba9b8bdf7…

MALICIOUS

PDF

106.0 KB Created: 2021-08-14 00:59:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 26da5026154b1f0cf90827417a9fbc0f SHA-1: e9ef2fd99bc1ce1114f590bd0952809c9c8e63f2 SHA-256: dd6d1ccba9b8bdf79f6ca0f77fc98ed7484cb128b140f30ff49711e3da75f427
164 Risk Score

Malware Insights

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

The PDF document contains numerous embedded links, many pointing to compromised WordPress upload storage or disposable hosting, suggesting a link farm designed to distribute malware. The presence of a visual download button further supports a phishing or malware distribution lure. ClamAV detection and ML classification confirm the malicious nature of the file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9877

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=slumdog+millionaire+full+movie+in+hindi+hd+480p+download+worldfree4u PDF link annotation
    • https://ratsimae.ee/media/contents/file/tixoradopopejilodube.pdfIn PDF document text
    • https://englewoodgrassfarm.com/wp-content/plugins/super-forms/uploads/php/files/15ac17ba600460ce75ff9b7d474328d4/74009457742.pdfIn PDF document text
    • http://123podkrovie.sk/editor_uploads/files/zenojase.pdfIn PDF document text
    • http://kaies.cn/upfiles/file/944118547.pdfIn PDF document text
    • http://wojno-stal.pl/pliki/file/sexekebibujademenixumidi.pdfIn PDF document text
    • https://www.vigo.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160b4bedacbbcf---lipagamafizif.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16105a88b5c342---93983671071.pdfIn PDF document text
    • http://prosquash.by/data/16725446373.pdfIn PDF document text
    • http://jhferry.com/data/fckeditor/file///76689089996.pdfIn PDF document text
    • http://hysansam.com/fckeditor/userfiles/image/tarozefa.pdfIn PDF document text
    • http://miamiwars.pl/wp-content/plugins/super-forms/uploads/php/files/d2e6c084f7a8f44272d3dbe076f510d3/lesoxa.pdfIn PDF document text
    • http://www.deadclan.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607eeac4e85c5---27055616459.pdfIn PDF document text
    • http://texmet.pl/userimages/file/bitigomerunukawisedujuwo.pdfIn PDF document text
    • https://sancarspune.com/wp-content/plugins/super-forms/uploads/php/files/d41cee318c7ea26a624b3597fb150b77/mamalurijewebepopenovano.pdfIn PDF document text
    • https://www.breastcancerfoundation.in/wp-content/plugins/super-forms/uploads/php/files/7a7d85977e0b9ecaa10e9b2ca174ae11/43475579107.pdfIn PDF document text
    • https://www.heainc.com/wp-content/plugins/formcraft/file-upload/server/content/files/160712728adfb4---1755214809.pdfIn PDF document text
    • http://erodiertechnik-wenzel.de/userfiles/file/gukafulova.pdfIn PDF document text
    • https://mintedimages.com/ckfinder/userfiles/files/wugewazefero.pdfIn PDF document text
    • https://mindweave.co.uk/wp-content/plugins/super-forms/uploads/php/files/a26bh66hloa1h7fq4kf3b5miur/81656608432.pdfIn PDF document text
    • http://becro-plast.hr/wp-content/plugins/formcraft/file-upload/server/content/files/16083510f220bf---joreluw.pdfIn PDF document text
    • http://www.orhancoskun.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d865afc2d6a---pisipowutoxusukatas.pdfIn PDF document text
    • http://ideatity.com/ckfinder/userfiles/files/94323263601.pdfIn PDF document text
    • http://cnp-inc.com/ckupload/files/67998551317.pdfIn PDF document text
    • https://ezgoe.com/10005001208290177/ckfinder/userfiles/files/vopoku.pdfIn PDF document text
    • http://greenearthgardens.org/userfiles/jitisokidaroko.pdfIn PDF document text
    • https://thepetrichortouch.com/wp-content/plugins/super-forms/uploads/php/files/9fi2opb4vi916t67q7ikls4jai/lupafaxedifuvagomifivo.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_off00013816.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13816 11416 bytes
SHA-256: 07f391b96db0a90335b12ebc0ad955b95cd984ef310de7e12c9150e4f6e4413d
font_01_sfnt_off000152af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x152AF 17816 bytes
SHA-256: 59304f0945b3b5a830fcf3064e218cf5d740f0e9f9b9ffa676ed898f2ff6d400
font_02_sfnt_off0001812c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1812C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1