Malicious PDF — malware analysis report

Static analysis result for SHA-256 e1958f9d9b12b793…

MALICIOUS

PDF

80.0 KB Created: 2021-09-19 02:34:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 1168f4e9717ea89e9cb52d5d72fe13c2 SHA-1: 3ca8d9d3bd1b653f50ad1c977f62ff8633d79f24 SHA-256: e1958f9d9b12b793e422065e641cddad026b5e968cc9aedd1c4f4dff6dc35d84
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, containing numerous URLs pointing to potentially compromised websites or disposable hosting. The presence of external URIs and link farm heuristics suggests the document's primary purpose is to redirect users to malicious sites, likely for phishing or malware distribution. No scripts were extracted, but the overall structure and URL patterns are indicative of a malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

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://garglob.ru/uplcv?utm_term=youtuber+live+apk PDF link annotation
    • http://www.predoisiasociatii.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16133588c9514a---29811801305.pdfIn PDF document text
    • http://orgue-chantepie.info/FCKeditor/upload/file/sazukatofu.pdfIn PDF document text
    • https://sidexsideaudio.com/wp-content/plugins/formcraft/file-upload/server/content/files/16134653304a5c---relilititisofosuwupuboso.pdfIn PDF document text
    • http://orderleesushi.com/uploads/files/61288824307.pdfIn PDF document text
    • https://zlatartopalovic.rs/files/bexudope.pdfIn PDF document text
    • https://www.projectorrentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614315aeea090---tumemer.pdfIn PDF document text
    • http://lisahyatthealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/16133f2dfd7644---75116379360.pdfIn PDF document text
    • http://creativetechno.in/userfiles/file/13163534527.pdfIn PDF document text
    • http://besttailor.info/ckfinder/userfiles/files/79018074633.pdfIn PDF document text
    • http://xn--76-6kca8aqc6c.xn--p1ai/pic/userfile/45968439765.pdfIn PDF document text
    • http://www.velkoobchod-man.eu/ckfinder/userfiles/files/widix.pdfIn PDF document text
    • http://kowel.com/ckfinder/userfiles/files/1631062853.pdfIn PDF document text
    • https://agmatbaa.com/upload/files/74753063637.pdfIn PDF document text
    • https://morganmethod.tuesdaytrader.com/ci/userfiles/files/xazekuzax.pdfIn PDF document text
    • http://smartvoicesys.com/userfiles/15154582925.pdfIn PDF document text
    • http://cesishotel.lv/res/wysiwyg/file/folirobofidoteki.pdfIn PDF document text
    • http://pilanatofishing.com/home/sandbox/domains/shelter.sandbox.tritek.hk/public_html/ckfinder/userfiles/files/37844230498.pdfIn PDF document text
    • https://xn--90aoja6ahg5ds.xn--p1ai/uploads/files/16671630214.pdfIn PDF document text
    • https://vinadesigndanang.vn/uploads/image/files/96709739201.pdfIn PDF document text
    • http://at2apigroup3.com/contents/files/50732617726.pdfIn PDF document text
    • https://cnc-ar.ro/files/file/9228868709.pdfIn PDF document text
    • https://sacc-la-chaux-de-fonds.ch/fichiers/file/kipipazixorenaxewezajugar.pdfIn PDF document text
    • https://taevlingar.se/images/pages/file/vawowuliredojitamam.pdfIn PDF document text
    • http://amicalelaique-guyancourt.fr/ckfinder/userfiles/files/75868100920.pdfIn PDF document text
    • http://fohow77.ru/upload/file/88494297593.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_off0000d47b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD47B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ec8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC8D 18016 bytes
SHA-256: d484ffd02a9641f9d3b035926dfe501722cbc996db3f800c5b47fb1fb3be01c2
font_02_sfnt_off00011b41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B41 10352 bytes
SHA-256: d09509b0d22eb28f36568ef6e47076d575163b6fed88ec2c2aaa1cd1d43d6484

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