Malicious PDF — malware analysis report

Static analysis result for SHA-256 afe9542acd9de3fd…

MALICIOUS

PDF

83.8 KB Created: 2021-09-22 13:18:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: aa79e80fa6792470953fa11a85329214 SHA-1: cb4e291b87161212ca2d1064ebdce44ff8174307 SHA-256: afe9542acd9de3fd65c4c674d1d25ac8e54d097b346f1ddffff593f0c8496409
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a large number of embedded URLs, many of which point to compromised websites or disposable hosting, indicating a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9911

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://myphambambi.com/webroot/img/files/6685521983.pdf In PDF document text
    • https://jimsdelibrookhaven.com/demo/jimsdeli/admin/userfilesfile/87862762379.pdfIn PDF document text
    • http://www.alfainstal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/161334a79b6a50---46715237322.pdfIn PDF document text
    • http://emiem.pl/public/upload/ckfinder/userfiles/files/misivufanigigo.pdfIn PDF document text
    • http://jvcc.cn/ckfinder/userfiles/files/210911160904834708gll5k.pdfIn PDF document text
    • https://portecitadelle.portecitadelle.ca/ckfinder/userfiles/files/54583033517.pdfIn PDF document text
    • https://botroul.be/uploads/46735388046.pdfIn PDF document text
    • http://ikra-ekb.ru/files/fckeditor/file/gugasofivu.pdfIn PDF document text
    • http://moestuinwebshop.nl/userfiles/file/74223442447.pdfIn PDF document text
    • http://www.vljainandco.com/userfiles/files/12030980976.pdfIn PDF document text
    • http://dvif.fr/userfiles/file/juwitudosa.pdfIn PDF document text
    • http://elmiraclassiccountry.com/wp-content/plugins/super-forms/uploads/php/files/ee8267265f042845a1a1536f0bc279ec/mobelixikoxiwigeb.pdfIn PDF document text
    • http://appartenvue.net/appart/upload/images/34603560312.pdfIn PDF document text
    • https://fajanav.com/aym_image/files/15576487851.pdfIn PDF document text
    • https://unitedcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/161357e01ac1f6---xobijanufojozelojoranufar.pdfIn PDF document text
    • https://rainbowprinter.com/app/webroot/files/file/ruzurupumufuravalomawuxan.pdfIn PDF document text
    • http://royalgroup.at/tmp/31893634130.pdfIn PDF document text
    • http://artio.pl/files/files/sunofagixiduge.pdfIn PDF document text
    • http://majedalkarkhi.com/pics/file/24646875771.pdfIn PDF document text
    • http://onishi-kyosendo.jp/archive/netumuzufotusuwumibep.pdfIn PDF document text
    • https://dalilak1.com/userfiles/file/44781492126.pdfIn PDF document text
    • http://mgbig.com/upload_fck/file/2021-9-15/20210915161027653353.pdfIn PDF document text
    • https://rent-1.es/ckfinder/userfiles/files/tapatarorivapodogadot.pdfIn PDF document text
    • http://aquarium-kochi.com/app/webroot/ckfinder/userfiles/files/sawizep.pdfIn PDF document text
    • http://studioagm.it/userfiles/files/xetebenusuj.pdfIn PDF document text
    • http://vizugy.hu/uploads/files/60898649211.pdfIn PDF document text
    • http://dansungsala.com/uploads/files/91560256314.pdfIn PDF document text
    • https://multimetrics.com/ckfinder/userfiles/files/tenotinavirabozejenuzegi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=battlefield+bad+company+3+apkPDF 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_off0000e08b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE08B 18000 bytes
SHA-256: f7cac723bb58fc5b38c363ca3d09415dbbf608c0b74dfe449565ccfec0e6f1db
font_01_sfnt_off00010f5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F5B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012772.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12772 11084 bytes
SHA-256: 67bc04f45c431e43c36f2dc4cd985c3893daa1c93ef04a28ffa96306d5f6b81d