Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e5bd3d1d52baaf7…

MALICIOUS

PDF

90.3 KB Created: 2021-10-05 07:25:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 208037c4cb1bdbf83f0ebf0306ec0de8 SHA-1: a67e3ee5733027656aa9bf21d97bcd6cd7415c79 SHA-256: 1e5bd3d1d52baaf7e396f8d3d9e0dcb2d0cb5505b7792fb4de54932a605d1e2d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm hosted on a compromised WordPress site, with numerous external URLs pointing to potentially malicious content. The presence of multiple external links and the hosting on a compromised CMS suggests a phishing or redirection attack.

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://pixomot.ru/uplcv?utm_term=common+mormon+butterfly+life+cycle
    • http://fantasypartyentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/16158121b79e17---61322196543.pdf
    • http://ylpqzl.com/ckfinder/userfiles/files/sodonabebinerewafus.pdf
    • http://livilgirls.com/files/pizefugizebefeku.pdf
    • https://livstyle.ro/home/livstyle/public_html/uploads/files/figonasabepafuto.pdf
    • https://micro-logic.ro/images/uploaded/file/xitelexufu.pdf
    • http://www.smartlandgroup.com/ckfinder/userfiles/files/lamaworigijukevirug.pdf
    • http://ornito-silesia.eu/userfiles/file/41692690977.pdf
    • http://sutipatika.hu/userfiles/files/nilim.pdf
    • http://bftt.marketsearching.com/upload/files/bafojadutifejatew.pdf
    • http://china-baby-clothes.com/d/files/48236885799.pdf
    • https://ofly.om-digitalsolutions.cn/upload/files/wazumonateboso.pdf
    • http://globalroomplus.com/bot/ckfinder/uf/files/20292600323.pdf
    • http://sugarfree-gelato.com/upload/file/dibuba.pdf
    • http://piazzademarini3ge.com/userfiles/files/54948714872.pdf
    • http://angarakshaksecurity.com/userfiles/file/wasedazixotudigubisejaxal.pdf
    • http://synfarm.com/upload/files/22101420356.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613a0c9eaeff4---finowedugesegonujuku.pdf
    • http://asijskepotraviny.cz/files/file/57179857960.pdf
    • https://unitedfightalliance.jordanadams.com/ckfinder/userfiles/files/5706606160.pdf
    • https://www.totspotdaynursery.co.uk/ckfinder/userfiles/files/gusuxukidipipofamagijab.pdf
    • https://grahampropertytax.com/wp-content/plugins/super-forms/uploads/php/files/2aa632b1ade6bd011c30638bb3940f93/1756258171.pdf
    • http://almar-bus.pl/userfiles/file/vevipowodoxawujosuravaxa.pdf
    • https://protradingindia.net/userfiles/file/59599600699.pdf
    • https://sharidendesignasphalt.com/wp-content/plugins/super-forms/uploads/php/files/6a9fd0db8c090476897937abcc854ff2/44366049480.pdf
    • 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_off0000fb2f.bin
140c4ee5889715ca9fa6b67591996f52f30e88d1ffb254cf9e9c1bdc63d383b1
pdf-font-stream PDF embedded font (sfnt) at offset 0xFB2F 19412 bytes
font_01_sfnt_off00012c27.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x12C27 16792 bytes
font_02_sfnt_off0001443e.bin
a50da983091edd2e3d3579327d01e074b84275c904fdf236269ef2b6968ad26f
pdf-font-stream PDF embedded font (sfnt) at offset 0x1443E 10552 bytes