Malicious PDF — malware analysis report

Static analysis result for SHA-256 069d2851b1fb9640…

MALICIOUS

PDF

111.2 KB Created: 2021-06-10 08:52:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 11b101afb1b76f862683aebbe6e4712e SHA-1: 3ac339c3fcf3b69fff073dd99ff679962ab60e04 SHA-256: 069d2851b1fb9640c7f2e3c1252d0bcbc96b36684f9084236f55917b39d50f21
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://drafthe.ru/pbw?utm_term=pal+pal+dil+ke+paas+mp3+song+download PDF link annotation
    • https://tapogizixe.weebly.com/uploads/1/3/4/8/134897788/7860785.pdfIn PDF document text
    • https://tapuroxoj.weebly.com/uploads/1/3/4/5/134599682/nulomulotidu.pdfIn PDF document text
    • https://zosesudemosovar.weebly.com/uploads/1/3/4/8/134865665/5410882.pdfIn PDF document text
    • https://fakegegi.weebly.com/uploads/1/3/5/3/135312823/429193aec3.pdfIn PDF document text
    • https://tisizapotiw.weebly.com/uploads/1/3/0/7/130776245/sizata_sasujeninopab.pdfIn PDF document text
    • https://goxanakevixi.weebly.com/uploads/1/3/4/8/134857001/3520382.pdfIn PDF document text
    • https://kotutoxegaru.weebly.com/uploads/1/3/2/6/132695780/5f306ab6ac6c.pdfIn PDF document text
    • https://wesodopudo.weebly.com/uploads/1/3/4/2/134234684/ninutixapetu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/4d88040f-2c6b-42b5-a4c0-7304ca003a23/kimepemonigesoxixuma.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6ec13dc4-50f6-45ec-8176-72ec60eb86e7/monopoly_city_rules.pdfIn PDF document text
    • http://mapaduzipi.pbworks.com/w/file/fetch/144507717/madirewefiwarusupimut.pdfIn PDF document text
    • http://ziriwuru.pbworks.com/f/kipuvatewirakibuzididubut.pdfIn PDF document text
    • http://faxamom.pbworks.com/f/61805633592.pdfIn PDF document text
    • http://medodadepud.pbworks.com/w/file/fetch/145028559/dm_chord_chart.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1f382fc6-3524-46ab-86e8-c56e79c981f2/tilazigavetu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5193fa23-954a-4fec-af52-43ca15d28e7a/luvogeso.pdfIn PDF document text
    • http://mulasamesi.pbworks.com/f/imr_blue_powder_load_data.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/517ce512-ad3f-4642-8e3c-088127af56cc/unblocked_games_vevo_basketball_heads.pdfIn PDF document text
    • http://lekuzax.pbworks.com/w/file/fetch/144417159/pekaxofamesejamositunuze.pdfIn PDF document text
    • http://sozegajamuf.pbworks.com/f/jexuvirudiditiwovaru.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7e5fa9e0-f4a7-49e2-a0be-ede3ff2d0239/rixabizut.pdfIn PDF document text
    • http://lesokulovisu.pbworks.com/w/file/fetch/145029219/41202356724.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/98658155-74f8-4552-bf94-064148710347/preposition_activity_for_grade_7.pdfIn PDF document text
    • http://jitilabajeko.pbworks.com/w/file/fetch/144666102/what_is_lactic_acid_fermentation_and.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://scripts.sil.org/OFLIn 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_off000160f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x160F9 5504 bytes
SHA-256: be30e8cf3f17c3757dbd6ac22d3f418613a3197b9c7a83c6a01cc1533d9e91f9
font_01_sfnt_off000173c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x173C0 11084 bytes
SHA-256: 1fe6416cd2ae48d926fabf02bfa7ac3b12ca95040d775e429d4ac5fac00dd4bb
font_02_sfnt_off000199cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x199CD 16144 bytes
SHA-256: 764fe263e68fd20aff2bbd96e69f5a400d440299d02096befa162391f913c7cf