Malicious PDF — malware analysis report

Static analysis result for SHA-256 49482a49fb7ee737…

MALICIOUS

PDF

81.7 KB Created: 2021-09-07 06:13:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: adb92f6751784cd028a414020e9ad3dc SHA-1: bd2ab6fc11b7ab6bb4548228f282697006f4bde5 SHA-256: 49482a49fb7ee737fb995e736640f1599a58463d109b7363fdaf80e6755f5549
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 and are structured as a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The presence of external URIs and link farms suggests an attempt to lure users to malicious destinations.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9846

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://www.popcaffe.it/wp-content/plugins/super-forms/uploads/php/files/ecafbb5ecc3d0eb0df18cabae17a97a5/62985782598.pdf In PDF document text
    • https://megalightgroup.lv/uploads/files/93536665621.pdfIn PDF document text
    • http://limeitec.com/upfiles/editor/files/98715356544.pdfIn PDF document text
    • http://localhomesales.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160c1bbecc1d9c---41991732122.pdfIn PDF document text
    • http://karat-dobremiasto.pl/userfiles/file/70193758944.pdfIn PDF document text
    • http://oodow.cn/upload/file/210706143303541379c5oisi7o9x2g.pdfIn PDF document text
    • https://www.arc-welding.co.uk/wp-content/plugins/super-forms/uploads/php/files/n54vlrkeutff5420qjjcipj8a5/mewipuxevodozef.pdfIn PDF document text
    • http://form4concrete.ru/pics/cont//file/85742511786.pdfIn PDF document text
    • http://tilestone-pools.com/i/File/72551095585.pdfIn PDF document text
    • https://ceccargiurgiu.ro/userfiles/file/9611389547.pdfIn PDF document text
    • http://reklama-kemerovo.ru/files/files/24478843208.pdfIn PDF document text
    • http://phillipwhiting.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cf63447ea91---nobazexute.pdfIn PDF document text
    • http://yoshitomo-kokubunji.com/jcfiles/file/42627595043.pdfIn PDF document text
    • https://banderlogclub.ru/Files/file/34745376836.pdfIn PDF document text
    • https://mingyi-lock.com/data/file/userfiles/files/kefinuk.pdfIn PDF document text
    • http://japanbizkorea.com/userData/ebizro_board/file/fekalojasutavopob.pdfIn PDF document text
    • http://mikailang.com/userfiles/file/20210820122340_2060699934.pdfIn PDF document text
    • http://winterwonderlandzundert.nl/uploadimages/files/wuvuxajojepenelomeno.pdfIn PDF document text
    • https://www.coconutlodge.com/wp-content/plugins/formcraft/file-upload/server/content/files/160907655c127c---61737446852.pdfIn PDF document text
    • http://barrospizzadb.com/uploads/files/93174544416.pdfIn PDF document text
    • https://aquarell.ro/userfiles/file/wefitixolonarejokogutum.pdfIn PDF document text
    • http://hhoasis.org/app/webroot/img/fck/file/33474114602.pdfIn PDF document text
    • https://csom.cz/wp-content/plugins/super-forms/uploads/php/files/f0a70d1884db12ee770d445a9e15b05a/dawuwaxavexefad.pdfIn PDF document text
    • https://noticky.net/akce/fotky/file/vowejifabanodolukobosup.pdfIn PDF document text
    • https://e-tta.com/app/webroot/userfiles/files/walawixejaxot.pdfIn PDF document text
    • http://casier-a-bouteilles.com/file/32790354304.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=doubling+worksheets+grade+1PDF 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_off0000da7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA7B 11000 bytes
SHA-256: 54112225ccb58911886e7c5557cd5ddf01157f733e35d93d87b16fa6e77de5bb
font_01_sfnt_off0000f3de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3DE 17332 bytes
SHA-256: 83bbaeebb87c1265ea2bb0ababe13cc1331802dd3f78229621498b0b112da558
font_02_sfnt_off000120e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120E5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.