Malicious PDF — malware analysis report

Static analysis result for SHA-256 2eea39a75c8dfce3…

MALICIOUS

PDF

79.1 KB Created: 2021-09-11 23:16:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: e5afc717fdf92e7b2cb3cb1d0ed00a8c SHA-1: 03ef2735e54d74ca8c10e926fd059e010e2cd567 SHA-256: 2eea39a75c8dfce34a5aa98285a4d418bfed58af3ca7dcf0193d55d78ea30733
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, and exhibits characteristics of a link farm. It contains numerous embedded URLs pointing to disposable hosting, suggesting an attempt to distribute malicious content or phish users. The PDF structure and embedded URLs are indicative of a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://pistant.ru/uplcv?utm_term=how+to+get+apks+on+ios PDF link annotation
    • http://k12kos.com/ckfinder/userfiles/files/jedudigazoxu.pdfIn PDF document text
    • https://www.sesc.com.ua/wp-content/plugins/super-forms/uploads/php/files/81ao4voa6ajcf5m0b36p9frkv4/xulorimewem.pdfIn PDF document text
    • http://reginahajo.hu/_user/file/vesodijazadinavibajoziro.pdfIn PDF document text
    • http://z-i-f.ru/userfiles/file/lukijorikufufuse.pdfIn PDF document text
    • http://www.corazondelsol.es/ckfinder/userfiles/files/71649243088.pdfIn PDF document text
    • http://chemtron-vostok.ru/media/file/vobogejutukujiboleme.pdfIn PDF document text
    • http://zit-tech.com/userfiles/files/guxafaxoj.pdfIn PDF document text
    • http://fnathservices.com/upload/file/fixuteve.pdfIn PDF document text
    • http://pilot-market.ru/new/files/file/luwipala.pdfIn PDF document text
    • https://wittnebel.dk/file/90033957620.pdfIn PDF document text
    • http://suphammamnon.org/uploads/files/powufajelumin.pdfIn PDF document text
    • https://www.taxiserviceh24.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612fc51765735---tupanufinejologegegoxi.pdfIn PDF document text
    • http://world-green-hope.com/uploads/files/99347385270.pdfIn PDF document text
    • http://ceramvetro.net/userfiles/file/12786298548.pdfIn PDF document text
    • http://debrecen.varosom.hu/userfiles/files/68800648237.pdfIn PDF document text
    • https://liepasmuiza.lv/userfiles/library/penuvolesisedebobijok.pdfIn PDF document text
    • https://sistemagestiondpr.com/userfiles/file/14342870266.pdfIn PDF document text
    • http://actinq.nl/upload/file/39904734834.pdfIn PDF document text
    • https://naveenent.com/administrator/imagetemp/file/46678990166.pdfIn PDF document text
    • https://hydratrend.com/application/third_party/ckfinder/userfiles/files/85015402848.pdfIn PDF document text
    • https://infrastone.com/userfiles/files/gapubafudorimana.pdfIn PDF document text
    • http://wxmx.cn/upload/ckimg/files/202109040252513417.pdfIn PDF document text
    • https://twr1115.net/files/fckeditor/file/26910635578.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d11f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD11F 17864 bytes
SHA-256: 421a18efbb4fe7b190d59f290338ce09a81760a99a6d1873d72173c6e8587247
font_01_sfnt_off0000fec3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEC3 10452 bytes
SHA-256: 075b3de008ea892cf272e43229c5d264369d341ab0cc01d18f77783048d140cd
font_02_sfnt_off000116b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116B7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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