Malicious PDF — malware analysis report

Static analysis result for SHA-256 dad80bcf8e9ef430…

MALICIOUS

PDF

77.8 KB Created: 2021-08-27 07:14:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: b29c40d9254cf0bcf8ef25c84eff399c SHA-1: c34959a1ce2cc7e4b100f3aaf9a4690f94731fe9 SHA-256: dad80bcf8e9ef430949b5fb22aaf30dab1ae73d804e4a7ca3d2e6bc8d125346e
156 Risk Score

Malware Insights

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

The PDF file was identified as malicious by a ML classifier and ClamAV, indicating it's a phishing or trojan distribution attempt. It functions as a link farm, with numerous embedded URLs pointing to various websites, some of which are hosted on compromised CMS platforms. The primary purpose appears to be directing users to potentially malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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://alianzatours.com/imagenes/file/vopemel.pdf In PDF document text
    • https://prsnashville.com/wp-content/plugins/super-forms/uploads/php/files/70ba2fa1836acfa2c3873effe90a9c41/62064841031.pdfIn PDF document text
    • https://kalatranslation.co.uk/wp-content/plugins/super-forms/uploads/php/files/6nvalhbccfkbi78j1lvk7s1svk/28955651312.pdfIn PDF document text
    • http://www.myhhsi.com/wp-content/plugins/super-forms/uploads/php/files/3d0afa9804f5bf26aee79555ba003e18/dakodebovunisora.pdfIn PDF document text
    • http://www.elsecretodelolivo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c10c7c3fa16---10309897482.pdfIn PDF document text
    • https://olgunbey.com/upload/ckfinder/files/tizobeladalerawagig.pdfIn PDF document text
    • http://www.drop-lok.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b48c69c0cf5---nupini.pdfIn PDF document text
    • https://samowar.me/upload/file/najetaxoje.pdfIn PDF document text
    • http://otczenacts.com/media/files/togezepagezijixefima.pdfIn PDF document text
    • http://dothi.info/images/files/14006676082.pdfIn PDF document text
    • https://clickbox.ro/images/file/14004742405.pdfIn PDF document text
    • https://torrentclub.vip/wp-content/plugins/super-forms/uploads/php/files/u8anum8tvkhfr3rbh42r38e1v6/96718364149.pdfIn PDF document text
    • http://longarmquiltacademy.net/fckeditor/userfiles/file/baxixagekubavare.pdfIn PDF document text
    • http://ndc-group.ru/uploads/files/13694562874.pdfIn PDF document text
    • https://minutesnap.com/wp-content/plugins/super-forms/uploads/php/files/bf19e08cc6711b81b1aca5c967b479f9/vesikebukipuwuregojezi.pdfIn PDF document text
    • https://gmonlinestore.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a2f637fc45---wasolaxilobusivame.pdfIn PDF document text
    • http://wakingbeauty.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c8e6b68e23---gemizer.pdfIn PDF document text
    • http://normel.org/files/upload/file/bumubukogosozuzi.pdfIn PDF document text
    • http://bettekingproductions.com/clients/874300/File/puboxusisaxarod.pdfIn PDF document text
    • http://jingchengs.com/jingchengs/ckfinder/files/20210725005559.pdfIn PDF document text
    • https://laser-arena.ch/wp-content/plugins/formcraft/file-upload/server/content/files/16086617436361---rudawitijasupanagezupajij.pdfIn PDF document text
    • http://jghsclass75.com/clients/f/f3/f322050927ea28328664fd088939ffaa/File/zilizoxeliz.pdfIn PDF document text
    • https://www.bluegreenshouseboats.in/wp-content/plugins/formcraft/file-upload/server/content/files/160af7a82290c0---busevuxirozifuz.pdfIn PDF document text
    • https://bancodevida.com/bancodevida/admin/images/image/file/77391755245.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=area+under+force+displacement+graphPDF 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cb4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB4A 16572 bytes
SHA-256: bfa99b9ab04f753612e68f3af4d08a1206a5832250d5c639e6ec134f1314a413
font_01_sfnt_off0000f680.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF680 11148 bytes
SHA-256: b4070e4a4a80122abc4206b9cbacfe2836ad432e41eac3cb57382110420c2d52
font_02_sfnt_off00011025.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11025 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1