Malicious PDF — malware analysis report

Static analysis result for SHA-256 45f5dffd142c9f82…

MALICIOUS

PDF

91.7 KB Created: 2021-07-04 21:01:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 07e7237861f71301788fa17809a90424 SHA-1: a1113cdf08be9bb9f832ebebde930c9fc738fc1c SHA-256: 45f5dffd142c9f829e3b83cd6e27fb2476974b9a87c6713a05bfb279dfcb6d51
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by ML classifiers and ClamAV, specifically flagged as a phishing trojan. It functions as a link farm, containing numerous URLs pointing to compromised WordPress upload directories and other potentially malicious sites. The primary purpose appears to be directing users to external resources, likely for phishing or scamming activities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://www.americanapi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b1494a6904---52132499514.pdf
    • http://www.auditsi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f5d4dd5830---zodewir.pdf
    • https://couvreur-hautdoubs.fr/internet_new/images_et_fichiers//file/wamabatawewadetok.pdf
    • https://webhostmurah.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084a48512ddb---17473870016.pdf
    • https://viticoltura-enologia.com/file/bagovoru.pdf
    • http://www.louthadventures.ie/wp-content/plugins/formcraft/file-upload/server/content/files/16075a8f64b23c---90200547176.pdf
    • http://suportti.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ed346972fd---2358647053.pdf
    • http://erfolgsapp.de/wp-content/plugins/formcraft/file-upload/server/content/files/16079f52e36022---folurura.pdf
    • http://glenbrooksouth1970.com/clients/1/17/17fc1bd13d5538a69f39d58c869d2fc5/File/gopinopenegunofowedal.pdf
    • http://clubselectionvoyages.com/images/file/29567592700.pdf
    • https://52fantasies.com/home/holly/public_html/ckfinder/userfiles/files/74192862207.pdf
    • http://evabody.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160b16964eeb61---99858116481.pdf
    • http://osullivanspressurewashing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8794727d19---lilalubaxowigewokefev.pdf
    • http://paymentsbusiness.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160788d242ac3b---nakafazilapes.pdf
    • https://bunyaminerdemir.com/resimler/files/25233904644.pdf
    • https://amenagementsoleil.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ce70407202---62652803601.pdf
    • https://lakeshoresmilesdentistry.com/wp-content/plugins/super-forms/uploads/php/files/46qc8f0idloiqome4tmnojfto4/lenuvuxuxabarasovi.pdf
    • https://theelementrama9.com/userfiles/files/89538390312.pdf
    • https://nationalcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ae26cb2b6c0---17665699214.pdf
    • http://longarmquiltacademy.net/fckeditor/userfiles/file/tenusileputezoz.pdf
    • https://cavalier-hundezucht.ch/userfiles/file/81483991422.pdf
    • http://maidnheaven.com/wp-content/plugins/formcraft/file-upload/server/content/files/160747e5b99d97---2542730788.pdf
    • http://starcity-vinhomes.vn/app/webroot/img/files/5300089275.pdf
    • http://cupta.org/userfiles/files/20210604110935.pdf
    • http://www.thelawchamber.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ff954b8b0a---47629621794.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=coin+master+daily+free+spins+25
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000101f5.bin
15dd47ee61171ea415fa6f559f32122e21a6d64d83744c320047d8e470a461a8
pdf-font-stream PDF embedded font (sfnt) at offset 0x101F5 16960 bytes
font_01_sfnt_off00012dfa.bin
933f26d71edd0984de6ba7919d4b170896ebcea3100751c50eaf2c8f3c5b8b09
pdf-font-stream PDF embedded font (sfnt) at offset 0x12DFA 11056 bytes
font_02_sfnt_off000147d3.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x147D3 16792 bytes