Malicious PDF — malware analysis report

Static analysis result for SHA-256 cf4190a91ebad668…

MALICIOUS

PDF

74.0 KB Created: 2021-05-08 09:52:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 22128eb30535e2fdb9be9cdaf16d5bb7 SHA-1: 47adf1dec664bd97098d4bf809e34a0f6dc4cfcc SHA-256: cf4190a91ebad668c95c27b3a4737d197e00d45e4800ac7e939aa1b46d926b03
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The document contains a large number of embedded URLs, many pointing to disposable domains, suggesting a phishing or link-farming attack. The presence of PDF_SEO_DISPOSABLE_LINK_FARM heuristic indicates a deliberate attempt to create a link farm on disposable hosting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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://fokemale.ru/strik?utm_term=sig+sauer+p229+40+s%2526w PDF link annotation
    • https://cdn.sqhk.co/tusenepobam/ddhePje/wordpress_login_redirects_to_wrong_url.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412154/normal_605b64f348691.pdfIn PDF document text
    • http://sitonuba.mypressonline.com/79065496639.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423780/normal_606011d781cb6.pdfIn PDF document text
    • http://rabatil.22web.org/forivodazamikopoxova.pdfIn PDF document text
    • https://cdn.sqhk.co/xupumekejaxa/9EgfjhL/75939751456.pdfIn PDF document text
    • https://cdn.sqhk.co/fawabanof/Lggehd2/grand_hotel_mania_cheats_level_40.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388427/normal_604f5a2445ef6.pdfIn PDF document text
    • https://cdn.sqhk.co/kubabulukod/jcifgcz/wodabad.pdfIn PDF document text
    • https://cdn.sqhk.co/wijelukifap/cv9hdoI/notepad_software_free_download_for_windows_10.pdfIn PDF document text
    • http://gumazesetijub.iblogger.org/can_am_spyder_rs_owners_manual.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4407327/normal_5ffb8340b2d8d.pdfIn PDF document text
    • https://cdn.sqhk.co/zibomevuguli/fbciim0/duvodakotowaja.pdfIn PDF document text
    • https://cdn.sqhk.co/talokelom/ibzjhhh/17129166432.pdfIn PDF document text
    • https://cdn.sqhk.co/noneniwetav/iiBzxhb/99231585392.pdfIn PDF document text
    • http://xozawuledol.iblogger.org/google_academico_tesis.pdfIn PDF document text
    • https://cdn.sqhk.co/perikowep/hGzgh7r/advertising_success_campaign.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://s3.amazonaws.com/zufojadibi/93259570111.pdfIn PDF document text
    • http://mimodiko.epizy.com/abscess_liver.pdfIn PDF document text
    • http://xidijunuv.rf.gd/13666204923.pdfIn PDF document text
    • https://s3.amazonaws.com/kakekojezutok/36901811630.pdfIn PDF document text
    • https://s3.amazonaws.com/jebokizez/nedadifumirawamos.pdfIn PDF document text
    • https://s3.amazonaws.com/zodawanuror/kodorat.pdfIn PDF document text
    • https://s3.amazonaws.com/wujixus/legovo.pdfIn PDF document text
    • http://mejumobax.atwebpages.com/hemolytic_uremic_syndrome_pediatrics.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d41b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD41B 5160 bytes
SHA-256: e597cad52dc47a07e8c51120d7447232f63c08d2cdea46afce6f55e99de2e91d
font_01_sfnt_off0000e5af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5AF 10792 bytes
SHA-256: 1ad94c88525feed8d7b8e5d4780e2b8b19d0292da8230468b3b5f48b4279e9e1
font_02_sfnt_off00010ac7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AC7 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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