Malicious PDF — malware analysis report

Static analysis result for SHA-256 e34d29b187397042…

MALICIOUS

PDF

82.5 KB Created: 2021-09-11 04:29:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: e3a9bb92197a267bb61a8982aa573aaa SHA-1: 404cbcaf99af18fce6482048adb690ce01ff0e86 SHA-256: e34d29b187397042f2dc605de644db8c8ed236ccce765647d2296960a663e843
126 Risk Score

Malware Insights

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

The PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, containing numerous embedded URLs that point to other PDF files hosted on various websites. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' suggests these links are part of a scheme to distribute malicious content or phish users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9928

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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 http://www.mariabeckmann.com/fotos/uploads/files/77218706416.pdf In PDF document text
    • http://printific.com/images/contentimages/files/bunanozufosenuxo.pdfIn PDF document text
    • https://sunkamalzemecilik.com/userfiles/file/tumelagorixone.pdfIn PDF document text
    • https://kotata-zlin.cz/obr/clanky/file/nubewetowuzomag.pdfIn PDF document text
    • https://landbondcorten.com/attachment/file/bb20d22fe6c94e8dd97d923908741ffe.pdfIn PDF document text
    • http://uyaviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/16139ab7002475---gozinevuzevejexowotare.pdfIn PDF document text
    • http://mazraeir.com/images/upload/files/43689381570.pdfIn PDF document text
    • http://architettotamborra.eu/userfiles/files/nowuj.pdfIn PDF document text
    • http://everest-c.ru/ckfinder/userfiles/files/27699133425.pdfIn PDF document text
    • http://anhuifan.com/upload_fck/file/2021-9-11/20210911082544620742.pdfIn PDF document text
    • https://fenicia.uy/fenicia.com.uy/uploads/files/pimufupu.pdfIn PDF document text
    • http://cnsgawefgl.netsociality.com/upload/files/wotaxu.pdfIn PDF document text
    • http://de.ruben.pl/ckfinder/userfiles/files/88516262377.pdfIn PDF document text
    • http://edmo-cars.nl/images/file/3218578037.pdfIn PDF document text
    • https://prolocolidodisavio.org/ckfinder/userfiles/files/sanisezekif.pdfIn PDF document text
    • http://happyorderfood.com/uploads/files/wesevopimusenevekorewuzo.pdfIn PDF document text
    • http://nhactheducthammy.com/upload/files/gagelifaxuwibalojegi.pdfIn PDF document text
    • https://henseltech.cz/userfiles/file/finimatabizavob.pdfIn PDF document text
    • http://golfvillageonline.com/userfiles/file/mewirugozurilixowakaz.pdfIn PDF document text
    • http://yourhandmadeitems.com/userfiles/file/zedidixis.pdfIn PDF document text
    • http://leasingtowers.com/ckfinder/userfiles/files/zimotali.pdfIn PDF document text
    • https://chokysitohang.com/Uploads/userfiles/files/73523141148.pdfIn PDF document text
    • http://unicorn-furnitures.com/d/files/33084994658.pdfIn PDF document text
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/161387db386fe8---jivomilobudaxedes.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=icewind+dale+d%26d+pdfPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cbf6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBF6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e40c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE40C 9912 bytes
SHA-256: 8c212817f827f8aefafdbed7781de1e66f22a5d0d5fef96ec2bf5ca4b3083de2
font_02_sfnt_off0000fa04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA04 2096 bytes
SHA-256: 811c93f2be9a5e495453fa25dc19aa18612f4feb15cc886cc2ccda596c3a8315
font_03_sfnt_off00010385.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10385 22920 bytes
SHA-256: 0d78ea3be18c3709b76a353f5c20d9896f81692e51a3a590d104f189108557e8