Malicious PDF — malware analysis report

Static analysis result for SHA-256 343cd0cb1518b756…

MALICIOUS

PDF

77.9 KB Created: 2021-03-12 12:25:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 680f38536cc120c4b231b156db72f7df SHA-1: b164cb6e1c45db61b07c4b0399768432934f9526 SHA-256: 343cd0cb1518b756c659158705e002ebdffc6a5dcc23edf9c6b0fe7c4d72121b
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains, and is flagged as a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. The presence of external URIs and the link farm heuristic suggest the document's primary purpose is to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://midufefew.ru/strik?utm_term=sharp+aquos+quattron+70+inch+price PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4426277/normal_5fca7d2a10326.pdfIn PDF document text
    • http://pshcomonhere.xyz/basic_security_testing_with_kali_linux_30m8tk.pdfIn PDF document text
    • http://zinabexodepo.iblogger.org/best_photo_collage_app_free.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482629/normal_600baae8dd66d.pdfIn PDF document text
    • http://aazzzry.space/birezerepodepzmypt.pdfIn PDF document text
    • https://kexulisil.weebly.com/uploads/1/3/4/7/134762119/29702c4f72b1327.pdfIn PDF document text
    • http://ver-alex.website/6498938555225zss.pdfIn PDF document text
    • https://donasidavojixa.weebly.com/uploads/1/3/4/4/134494786/5746687.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459166/normal_603de3f43d590.pdfIn PDF document text
    • http://prodson.space/34239675312rg4rt.pdfIn PDF document text
    • https://vusuvokitajize.weebly.com/uploads/1/3/0/8/130874031/fikat.pdfIn PDF document text
    • http://swiss-gear-top.xyz/98147431581n6gmn.pdfIn PDF document text
    • http://nuveclovet.xyz/disciples_of_harmonyr6q2c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4499002/normal_5fc8cfe491938.pdfIn PDF document text
    • http://euromarket.pro/hedge_fund_private_placement_memorandum9gni0.pdfIn PDF document text
    • https://mabobuloxulekev.weebly.com/uploads/1/3/4/6/134692970/3225815.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489414/normal_601d3681a40cf.pdfIn PDF document text
    • http://italysummer.space/my_cloud_app_fr_windows_10fmio1.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://9afb1793-bc57-4514-bb46-74e980466609.filesusr.com/ugd/11f207_092ccda02f70484eb76a560be077e3fe.pdf?index=trueIn PDF document text
    • http://tijopuzotozume.rf.gd/functional_data_analysis_ramsay_download.pdfIn PDF document text
    • http://bimekikup.epizy.com/blitzwolf_bw-_fye5_manual.pdfIn PDF document text
    • https://034618a9-9b39-4f41-ad18-95bca1d1c80b.filesusr.com/ugd/48d9a1_3b2f6f14e25f40e7935f66a8f4ce6557.pdf?index=trueIn PDF document text
    • http://kagufunoziwezu.epizy.com/formule_calcul_moyenne_pondre_excel.pdfIn PDF document text
    • http://dowegumorugujon.epizy.com/paxixu.pdfIn PDF document text
    • https://6129906d-bc82-46a7-99f5-71793a58af3c.filesusr.com/ugd/d162e3_b5e43338f3004bec8b6961b5862c1660.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f1b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1B4 5440 bytes
SHA-256: a524ac477b575ed041612ca127803b0e078362484f771c9b81b060755bfbb18b
font_01_sfnt_off00010435.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10435 11232 bytes
SHA-256: 2bbd97e891d8397646892cbcd64f08d7da57dbbb00c4f798ce3f299cea7920f6

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