Malicious PDF — malware analysis report

Static analysis result for SHA-256 3a2089dd598c9e25…

MALICIOUS

PDF

84.4 KB Created: 2021-05-23 21:00:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 248721bab37eeb4834c3ff8d2ffad8db SHA-1: e4f6040abd6f27b57e7de9013d147a5427dd6f0d SHA-256: 3a2089dd598c9e25a940c031807a3710df3cf054e57f37a4baa4b466ed5a919e
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with one prominent link leading to a suspicious domain ('jottigo.ru') that is likely used for phishing or malware distribution. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, suggesting a tactic to distribute malicious content or engage in SEO manipulation for malicious purposes. While no scripts were explicitly extracted, the PDF structure and the presence of external links strongly suggest an attempt to redirect the user to a malicious site, aligning with phishing or malware delivery tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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 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.
  • 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://jottigo.ru/strik?utm_term=t-motor+f55a+pro+ii+manual PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4409257/normal_6056fd78d8744.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417808/normal_5fef911b2006d.pdfIn PDF document text
    • https://mulibini.weebly.com/uploads/1/3/4/8/134881685/2620161.pdfIn PDF document text
    • https://nezopubetuw.weebly.com/uploads/1/3/2/6/132681339/sitewozurafubub_gemonoru_xarafez_wililef.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422890/normal_6055bb6ac0e75.pdfIn PDF document text
    • https://latopilufazi.weebly.com/uploads/1/3/4/0/134017217/0bb2bf27a203.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4404965/normal_600029293f092.pdfIn PDF document text
    • https://witojezig.weebly.com/uploads/1/3/0/7/130776148/refamexalekaw-wukilovezenud-naguwi-xigomiligi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501484/normal_60372e07a0338.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369916/normal_5fed64261dfde.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4418590/normal_6004d06276cd6.pdfIn PDF document text
    • https://foboxujegi.weebly.com/uploads/1/3/4/6/134694162/8e51b918c0bd8bd.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/memobofilenabon/kps_performance_status_ecog.pdfIn PDF document text
    • https://s3.amazonaws.com/wupiwupiwot/footer_bootstrap_template_css.pdfIn PDF document text
    • https://s3.amazonaws.com/lulelepese/job_application_letter_and_resume.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f5460e28-358d-4bbd-a502-9f5056c8fbfe/baby_g_childrens_watches_uk.pdfIn PDF document text
    • https://s3.amazonaws.com/dowavelaxam/lenigedumosaviwuleboge.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ae76309d-d65c-4593-8b16-a211c15b17d8/terraria_1.3.0.7.pdfIn PDF document text
    • https://s3.amazonaws.com/bagisi/faxupoxozasafolov.pdfIn PDF document text
    • https://s3.amazonaws.com/dibedamoka/girl_scout_song_on_my_honor_lyrics.pdfIn PDF document text
    • https://s3.amazonaws.com/woxewiwupir/elmore_leonard_fire_in_the_hole_epub.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c85d6b83-7712-43a2-b171-52d11f95fcdd/what_food_can_i_eat_on_a_mediterranean_diet.pdfIn PDF document text
    • https://s3.amazonaws.com/bulikowexunepov/87239187805.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_off0000f26a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF26A 4976 bytes
SHA-256: c16e23234fa987dc8065cd61082a79169188fb323af61aee02c6babad0e25594
font_01_sfnt_off0001034d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1034D 13940 bytes
SHA-256: 9462a881f8c7fdc470b8069cebbacfc53b166a9ff0e954a0b2cb2568f1a7a22e
font_02_sfnt_off00012f24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F24 16108 bytes
SHA-256: 2205f80250051514ec182f1c8ffecedb710bd02d8a923184b86fce9ac0ce96a8