Malicious PDF — malware analysis report

Static analysis result for SHA-256 55f0d541b0ad90d2…

MALICIOUS

PDF

98.6 KB Created: 2021-08-13 15:15:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: fc14570978985e7b5b6207557b9a7ec8 SHA-1: 9487303ec0a4f5396395bfbc128bc4a2db1b318b SHA-256: 55f0d541b0ad90d2090e3cea0c753bba7625823aac13fbd4a71298c3c26ab675
156 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains a large number of links, many pointing to compromised WordPress sites and disposable domains, suggesting it's designed to lead users to malicious content. The embedded URLs and link farm heuristics indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9986

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://queure.ru/uplcv?utm_term=biblical+hebrew+grammar+chart+pdf PDF link annotation
    • http://zawayakw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a53feb07e4c---5059626478.pdfIn PDF document text
    • http://vilaportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/160fb702e84dc5---35710252366.pdfIn PDF document text
    • https://xn--64-mlcufjjaii0l.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/8d89486df0a296a915957303d2c35d4f/28625404294.pdfIn PDF document text
    • http://abpaluso.com/upload/file/38269001711.pdfIn PDF document text
    • https://jotelek.hu/files/file/23124172760.pdfIn PDF document text
    • https://xn--1--8kcai1ck2bs.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/60008e5dccf756e37fbd391979f0fe34/pusopezazunejuwedogi.pdfIn PDF document text
    • http://www.colegiometa.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/160b0e67b80395---tesewubonidetov.pdfIn PDF document text
    • http://aci-immobilier-douai.fr/userfiles/files/gitulezujebelizati.pdfIn PDF document text
    • https://ptkas.com/kingkong/userfiles/files/zumoxedu.pdfIn PDF document text
    • https://noventa.cz/media/files/file/watusijagibenoremep.pdfIn PDF document text
    • https://olivier-daulte.com/ckfinder/userfiles/files/56593419195.pdfIn PDF document text
    • https://athensviptour.com/wp-content/plugins/super-forms/uploads/php/files/0cfcc70bd51cbee77dcd63aaf8167285/75919185846.pdfIn PDF document text
    • https://hpx.com.ua/wp-content/plugins/super-forms/uploads/php/files/c3fd90abf9a9fb57bc1609d615a6a067/nipizinupud.pdfIn PDF document text
    • https://speakingparrot.com/upload/ckfinder/files/65035259491.pdfIn PDF document text
    • https://fastcomputer.vn/wp-content/plugins/super-forms/uploads/php/files/3d523fdbbb8cb216c0773f2f32aa2a0d/69912984659.pdfIn PDF document text
    • http://hanifeugur.com/image/files/sejifegomiromana.pdfIn PDF document text
    • https://egyptsuntours.com/userfiles/files/dajejabejigavokubutoduf.pdfIn PDF document text
    • http://www.cheapmotorcycleinsurancepa.com/wp-content/plugins/super-forms/uploads/php/files/bcv2oan74uqn58kccfb9ht4oc2/6933548945.pdfIn PDF document text
    • https://weblative.com/wp-content/plugins/super-forms/uploads/php/files/2eg5e1eq8o5l9i5alug7f47iqq/robipekegovowux.pdfIn PDF document text
    • http://shihtzufurbabies.net/clients/d/d3/d383cf0c90cf2d2391705d5438694b4c/File/jawudexeneg.pdfIn PDF document text
    • http://lotuscourtpune.com/wp-content/plugins/super-forms/uploads/php/files/h8mm6a6mjvaggpt8qi7ha72890/xexarojometixivelafer.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f9f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9F7 18444 bytes
SHA-256: 67ce86a0b22e649f8da7855670987e26d47557aa52acf16e12f6884d8471ea6b
font_01_sfnt_off00012a20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A20 19280 bytes
SHA-256: 82b6066b487130a2f943b6b6abc73acf4b2ee679bbbbd60abbd1da9947bca7fa
font_02_sfnt_off00014aef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14AEF 10956 bytes
SHA-256: b435d8027b08639a8a634319d4afc757d9a48417889e15ee0e9d8fcb62194f03
font_03_sfnt_off00016401.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16401 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.