Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d3a25f747c6598c…

MALICIOUS

PDF

75.1 KB Created: 2021-09-19 22:50:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: b98f946a45d2ee9600d162455dfc355d SHA-1: 1a40382bbf770c40370297ce8da7e8bf21d3aeae SHA-256: 2d3a25f747c6598c695bbe5f9e4b4d2d390b5ca75d2d2e9e2e821e1b32524320
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains embedded JavaScript and multiple external URIs, many of which point to potentially compromised or disposable hosting, suggesting a phishing or malware distribution scheme. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or delivering a secondary payload. The presence of embedded JavaScript points to its use in executing malicious actions within the PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://bsbcarpet.com/userfiles/file/96735349967.pdf In PDF document text
    • http://all-vehicle.net/js/upload/files/34295852563.pdfIn PDF document text
    • http://lifeline-sports.com/files/file/bigepozumagamevagil.pdfIn PDF document text
    • http://www.skupp.pl/wp-content/plugins/formcraft/file-upload/server/content/files/161325618bacbe---rifijis.pdfIn PDF document text
    • http://cnzhongkui.com/fckeditor/editor/filemanager/connectors/php/uploads/file/170805429068.pdfIn PDF document text
    • https://sakura-bashi.com/uploads/files/202109052228382455.pdfIn PDF document text
    • http://www.maoles.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612fe32480d0c---55881519200.pdfIn PDF document text
    • https://mantyobras.com/userfiles/file/58948085397.pdfIn PDF document text
    • http://malbreil.com/userfiles/file/22086819322.pdfIn PDF document text
    • http://tekizolasyon.com/ckfinder/userfiles/files/bewijo.pdfIn PDF document text
    • http://manpukuorder.com/uploads/files/vuxokabolifitatifad.pdfIn PDF document text
    • https://tamtam.com.ua/wp-content/plugins/super-forms/uploads/php/files/cd89f6ae6b47db85f861f6d5d776018e/monijufane.pdfIn PDF document text
    • http://www.hzkontejnery.cz/ckfinder/userfiles/files/16886485049.pdfIn PDF document text
    • http://noahmission.org/dataroom/file/99332223946.pdfIn PDF document text
    • https://cortopolis.ar/userfiles/file/xujokavuzelok.pdfIn PDF document text
    • http://xn--80aejmo0alc.xn--p1ai/ckfinder/userfiles/files/nubafamikititete.pdfIn PDF document text
    • http://lube-stc.com/ckfinder/userfiles/files/vevinatujawexit.pdfIn PDF document text
    • http://www.travelwithtaangoo.com/img/file/dulasaromox.pdfIn PDF document text
    • http://dfzh.jmdftour.com/fckeditor/userimages/file/lodirevepevabor.pdfIn PDF document text
    • https://mytekas.com/UserFiles/file/zajidigobobepodada.pdfIn PDF document text
    • http://www.deewanalarab.com/up_imgs/40433665150.pdfIn PDF document text
    • http://como.gattinonimondodivacanze.it/themes/userfiles/files/85866621288.pdfIn PDF document text
    • http://wingprocess.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/vekekanujipanuxunegavisip.pdfIn PDF document text
    • https://amt-alarmy.pl/userfiles/file/bonavipapetuz.pdfIn PDF document text
    • http://atrsara.ir/resource/files/jizutorepenib.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=pdf+converter+apk+crackedPDF 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_off0000c499.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC499 10464 bytes
SHA-256: b3b3a4927bf75257abe6ae2fb7145884bfe68169737a2fb300f8d4dc7e287fac
font_01_sfnt_off0000dc8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC8D 16572 bytes
SHA-256: 0690418fb1ca50a19e0d6f9215f91e6e64d3c438cb782cd67018f37317b15439
font_02_sfnt_off000106ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106EF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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