Malicious PDF — malware analysis report

Static analysis result for SHA-256 5bfefa1c0687e0e8…

MALICIOUS

PDF

87.1 KB Created: 2021-05-06 08:57:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 1b261efa972432b8c473096bf0b5d3b1 SHA-1: ed437ea27dbb68edd8a65331f8f1154e6fbe1ed4 SHA-256: 5bfefa1c0687e0e81ca1b1a8ca5080fbba7105855a9df9615f85f6a32cba33b0
186 Risk Score

Malware Insights

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

This PDF file contains a link farm designed to redirect users to numerous other PDF documents hosted on disposable domains. The primary URL, 'https://fokemale.ru/strik?utm_term=what+is+the+final+stanza+in+a+poem', appears to be a lure, potentially related to search engine optimization tactics. The presence of a large number of external links and the ML classifier's high confidence score indicate a malicious intent, likely to distribute further malware or engage in phishing activities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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
  • 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://fokemale.ru/strik?utm_term=what+is+the+final+stanza+in+a+poem PDF link annotation
    • https://pupadidaf.weebly.com/uploads/1/3/0/8/130873798/da8654d75b070e.pdfIn PDF document text
    • https://gunupilerupuva.weebly.com/uploads/1/3/1/8/131871796/c26236979d793d.pdfIn PDF document text
    • https://wiwofuda.weebly.com/uploads/1/3/2/3/132303082/5318936.pdfIn PDF document text
    • http://deladinabixek.sportsontheweb.net/chapter_2_business_ethics_and_social_responsibility_ppt.pdfIn PDF document text
    • http://vodizurulenega.mypressonline.com/analog_and_digital_circuits_books.pdfIn PDF document text
    • http://zitalogeloluwiw.mygamesonline.org/82724606922.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413109/normal_60018d8b2a4f4.pdfIn PDF document text
    • https://tajupifode.weebly.com/uploads/1/3/1/0/131070450/joros.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366374/normal_60564460ad7f2.pdfIn PDF document text
    • https://majotowuwirup.weebly.com/uploads/1/3/5/3/135346036/16b78144d7.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://6afed14e-2b01-442b-8c2e-11a8a6f39965.filesusr.com/ugd/46a5ae_c91c249cc93d4526970e78226a1d84e2.pdf?index=trueIn PDF document text
    • http://dapekafuxururo.myartsonline.com/capteur_d_humidit_du_sol_arduino.pdfIn PDF document text
    • http://sorisavitekinuj.onlinewebshop.net/merebusosos.pdfIn PDF document text
    • https://fdf0fb27-5181-4190-8e1a-80fb86d87eb1.filesusr.com/ugd/2410c9_2dbc7c997c9b4303b108a9893000c3a6.pdf?index=trueIn PDF document text
    • https://ca30e0e0-ecf2-44ab-b6a2-fe26291458be.filesusr.com/ugd/34e21e_b63ec7ac64544ac0a4bcacf3240bee4c.pdf?index=trueIn PDF document text
    • https://d70b1dc8-7d09-4148-9854-e6a7cae1b87b.filesusr.com/ugd/5899d5_f6c6565e2ed34751921cb9d5e0d7204b.pdf?index=trueIn PDF document text
    • https://88749095-6fd7-453f-8e8a-15b48fe47dd1.filesusr.com/ugd/e4d7df_be0083cb5ad84a9486d6e3cde1408120.pdf?index=trueIn PDF document text
    • https://37e0f79d-b0c1-4727-b76d-5b759c81288f.filesusr.com/ugd/9c66ff_d2273a9cc5e54d4eb0baf8be2a5bf2c8.pdf?index=trueIn PDF document text
    • http://vumovofun.onlinewebshop.net/16123287743.pdfIn PDF document text
    • https://f84ffea9-2755-49c2-9cb5-47ca8b55fe65.filesusr.com/ugd/0adedf_194d516763984a99924255c39ebafb22.pdf?index=trueIn PDF document text
    • https://21d44941-995c-48b9-956b-8145330e20d5.filesusr.com/ugd/577b75_6244990bbcec4a99a305b82e01d41a30.pdf?index=trueIn PDF document text
    • https://592908bf-dd96-48cc-88d9-ffebbdd10d84.filesusr.com/ugd/f34823_672a9d67b6d74c968b24c685459d2a82.pdf?index=trueIn PDF document text
    • https://c504e2ef-f928-4e80-b5b1-fc05046f432e.filesusr.com/ugd/247f25_2d89361961c646c8afe645593230cd51.pdf?index=trueIn 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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010ba8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BA8 4896 bytes
SHA-256: 1cd1b29cd0deab392ae886eabf12c2047a2ea10886a4aa7e77339c94fc83e1b6
font_01_sfnt_off00011c2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C2E 10616 bytes
SHA-256: 0a29f2c4f292feceefe250120f1c90bd5ee85ff3344f256947bbe5a0324e25c1
font_02_sfnt_off00014062.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14062 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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