Malicious PDF — malware analysis report

Static analysis result for SHA-256 7077b9ed23ffba31…

MALICIOUS

PDF

111.0 KB Created: 2021-06-29 05:48:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 8b19504038ae17b6a543e15d359a5b9c SHA-1: d33552cb97861318db92d1d0f5619acfd6580b5b SHA-256: 7077b9ed23ffba311756527f2e4a791c88b5e921ff42437bb6adf1f81d10fe08
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ML classifiers and ClamAV as malicious. It contains a large number of links, many pointing to compromised websites or disposable hosting, suggesting it's designed to lead users to malicious content. The presence of PDF_SEO_DISPOSABLE_LINK_FARM and PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM heuristics further supports this, indicating a link farm strategy. No scripts were extracted, but the overall structure points to a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9868

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://oceanflowerhotel.com/uploads/image/files/47725631869.pdf In PDF document text
    • http://antifftech.com/uploadfile/file///2021051723221956.pdfIn PDF document text
    • http://www.holzbau-hoelzl.at/wp-content/plugins/formcraft/file-upload/server/content/files/160c2d2c0a174a---4903312638.pdfIn PDF document text
    • http://bubblesoflove.net/wp-content/plugins/formcraft/file-upload/server/content/files/160a32237d1d47---65573061433.pdfIn PDF document text
    • https://avis-medical.ma/wp-content/plugins/super-forms/uploads/php/files/3b622f75b8d88ebfde53240b92d7dd67/85353762444.pdfIn PDF document text
    • http://mirrorgallery.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d44de1b3140---1677273967.pdfIn PDF document text
    • https://www.parkgest.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1607ad26fd2f4d---fetemado.pdfIn PDF document text
    • http://studioassociatoemc.com/userfiles/files/jinukotagofomitalifavun.pdfIn PDF document text
    • http://bioident.pl/photos_fck/file/7986583894.pdfIn PDF document text
    • http://deficanderel.org/clients/6/67/674a09facce11b7629d390eef9534ff9/File/5099094919.pdfIn PDF document text
    • https://master.plus/wp-content/plugins/super-forms/uploads/php/files/9bba3f7d44721814ff172ec2af82e647/woboxaxevokira.pdfIn PDF document text
    • https://www.xcelsus.de/wp-content/plugins/formcraft/file-upload/server/content/files/160bdcbbe44878---bupimarorogor.pdfIn PDF document text
    • http://studiotecniconuti.it/userfiles/files/31904643460.pdfIn PDF document text
    • http://phuquytravel.com/nguyenvanlinh/files/zatenisajizotonegidipu.pdfIn PDF document text
    • http://bhsclassof70.com/clients/a/ac/acf0241a72c9eb28a719a759cf8a4748/File/mozipiluzefuwuvinirakaje.pdfIn PDF document text
    • https://hacunamatata.ru/wp-content/plugins/super-forms/uploads/php/files/14cbc6dceccaa54ddbb625536ad3d88f/kanebolirowivi.pdfIn PDF document text
    • https://www.advids.io/wp-content/plugins/formcraft/file-upload/server/content/files/160ae853ad6139---98803049858.pdfIn PDF document text
    • https://willmarlakesarea2040.com/ckfinder/userfiles/files/jesiziwabubofasikusoda.pdfIn PDF document text
    • http://seabeachthailand.com/UserFiles/file/fijujojexez.pdfIn PDF document text
    • http://thaiboxes.com/piceditor/file/vifuwegonep.pdfIn PDF document text
    • http://www.combatsim.eu/wp-content/plugins/formcraft/file-upload/server/content/files/16076cc7f06743---94688150566.pdfIn PDF document text
    • https://aashianarealty.com/file/xemiderorurudaretal.pdfIn PDF document text
    • http://elonsummerstorage.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bbb61f976de---26173940230.pdfIn PDF document text
    • http://nutricion-intravenosa.com/wp-content/plugins/super-forms/uploads/php/files/891766f041847120aff63423d6079b76/81349927850.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=acceleration+vector+calculusPDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00013a84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13A84 17652 bytes
SHA-256: 024b1663d82a48b75eeb4e18dcf83a7fea627740eba43e889a87299ed270d16d
font_01_sfnt_off0001694f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1694F 16076 bytes
SHA-256: c49465b94fe86b96ca820c65ff354120e534cda7b3173055630da28bac13411d
font_02_sfnt_off00017e80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17E80 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off00019697.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19697 10368 bytes
SHA-256: 64bf63c1784ee05e206f5c9759d03814544de1c80a6e6a9b83da1e9724df3bdc

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