Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d3f51e11217071b…

MALICIOUS

PDF

80.4 KB Created: 2021-09-11 00:05:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 02c2aaca8d8cad1d4ff54665d3696753 SHA-1: 62b576b85436e34c5c82966cb06e6d3a9e6f0624 SHA-256: 0d3f51e11217071bb1d81837c7672251c85074e2664cc98df702f14171c9cfd7
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, specifically flagged as Pdf.Phishing.Trojan. The PDF contains numerous external URIs and link farm patterns, indicating an attempt to redirect users to potentially malicious websites. The presence of embedded URLs and the overall structure suggest a phishing or malware distribution campaign.

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://drafthe.ru/uplcv?utm_term=al+quran+apk PDF link annotation
    • https://elitteaccesorios.com/wp-content/plugins/super-forms/uploads/php/files/28m4sujuag2nlic0t2fgjsepf4/jukemupawibozekevodisog.pdfIn PDF document text
    • https://yomadesign.com/userfiles/Proj_Name/files/pudirenigodafadof.pdfIn PDF document text
    • http://minhtoangalaxyhotel.vn/app/webroot/files/ckfinder/files/pideregugodi.pdfIn PDF document text
    • http://czerwoneiczarne.pl/files/file/rinobojikinikabozojino.pdfIn PDF document text
    • http://www.skup.it/wp-content/plugins/formcraft/file-upload/server/content/files/16133d08ac7944---gubewaxumile.pdfIn PDF document text
    • http://constructionone.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1613bc7a9ad5d6---mefubafowemajibetiropo.pdfIn PDF document text
    • http://hockjoohin.com/admin/uploads/file/88678072636.pdfIn PDF document text
    • https://elemental-ia.com/userfiles/file/38034045835.pdfIn PDF document text
    • https://xn--pssa17sw71b.tw/upimages/files/dawonagakovar.pdfIn PDF document text
    • http://hasadtemizlik.com/upload/file/neripilat.pdfIn PDF document text
    • http://xn--72c7caerxx0d3a9eve.com/UserFiles/File/gisepazejoxoragaril.pdfIn PDF document text
    • http://mopron.ru/upload/files/22841525366.pdfIn PDF document text
    • http://handsonmontessoripk.com/userfiles/files/xisud.pdfIn PDF document text
    • http://schodylux.pl/userfiles/file/ligazifowamupukunawegej.pdfIn PDF document text
    • http://rafaelstore.ru/upload/files/19739708773.pdfIn PDF document text
    • http://goldenpeak.it/userfiles/files/bidipubosibufunez.pdfIn PDF document text
    • https://huaku3c.tw/uploads/files/202109011322576478.pdfIn PDF document text
    • http://wsm.hk/images/uploadfiles/file/fufazejelajunasewuz.pdfIn PDF document text
    • https://ncvpte.in/userfiles/file/27226342256.pdfIn PDF document text
    • https://myphi.biz/nbloom/fckuploads/file/67723427551.pdfIn PDF document text
    • http://rapabzenec.cz/obrazky/files/70777118880.pdfIn PDF document text
    • http://hferrynetworks.com/FileData/ckfinder/files/20210911_240DAEA2EF7F9D4E.pdfIn PDF document text
    • http://xszhuhai.com/uploadfiles/files/18073273718.pdfIn PDF document text
    • https://ozora.schaffsen.com/contents/file/84543422982.pdfIn PDF document text
    • http://a2hgghk.handylover.com/upload/files/nekodexiparorise.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_off0000d47d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD47D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ec93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC93 9952 bytes
SHA-256: e205889451a7729fdbadbf50ad65f8d6f7b2a47cbb594fbda06a21b9078c5e9a
font_02_sfnt_off0001029b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1029B 19152 bytes
SHA-256: 6a1e2076bc8c13b50152e3a18be1327c2a5c7aa6c96f7e1d0d56cc2c6a332a16