Malicious PDF — malware analysis report

Static analysis result for SHA-256 dddd21b0672c21dc…

MALICIOUS

PDF

74.0 KB Created: 2021-05-11 01:26:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-23
MD5: 45c0f4908922cbff65582600f0f2e19d SHA-1: fb638da5ba7b33c1d5aa13dd4d276ea4267f5732 SHA-256: dddd21b0672c21dc9a7d7735e48b8a868a8f3abbbfc84351d468365c461bc315
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file contains numerous external links, many hosted on disposable domains, suggesting a link farm or SEO spam tactic. The presence of a specific search term 'autocad lt for mac' in one of the URLs indicates an attempt to attract users searching for that software. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://xezojetit.ru/strik?utm_term=autocad+lt+for+mac PDF link annotation
    • https://litepuvib.weebly.com/uploads/1/3/4/7/134741427/4377526.pdfIn PDF document text
    • https://kosefunoz.weebly.com/uploads/1/3/0/7/130775186/4758078.pdfIn PDF document text
    • http://podarokinsta365.site/denubeponenifiqlf1e.pdfIn PDF document text
    • http://effektzhizni.ru/periodic_table_all_elements_nameszawco.pdfIn PDF document text
    • https://zagukosi.weebly.com/uploads/1/3/4/3/134314994/ffb80b5b22c5.pdfIn PDF document text
    • http://ru-payment.casa/690083271015stsz.pdfIn PDF document text
    • http://myluckywin.site/nipamedakikezerazataba4y8u.pdfIn PDF document text
    • https://kizofirelurok.weebly.com/uploads/1/3/1/6/131606598/b80c16d194f.pdfIn PDF document text
    • http://ins.expert/citizen_eco_drive_sapphire_wr100_black3t759.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://b1706aec-e9b1-4c6c-9a93-f14ef4a1c402.filesusr.com/ugd/3b47cb_22486dd40d174dd3bf1d5808aed57e7a.pdf?index=trueIn PDF document text
    • https://40785fcd-1e5e-4316-9306-5db1d5795eae.filesusr.com/ugd/2f07a1_3eb9810adc934106bba755f5a11d0dd0.pdf?index=trueIn PDF document text
    • https://0bc2ebcf-5b85-435c-8290-6c6350a165f2.filesusr.com/ugd/ee98f5_08c6fe9fc7d04ade82d7ad1d526f8c56.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tunenijexe/66489252086.pdfIn PDF document text
    • https://9d1e48ad-bcd7-4831-9b7b-7108443a63b6.filesusr.com/ugd/136d07_f1041cdb6c0442ea9baefd292fd2816e.pdf?index=trueIn PDF document text
    • https://95049c82-e412-4913-a0b0-e03e83d5170a.filesusr.com/ugd/127d6e_ca79e8abd7f14ddbba5b316f273be205.pdf?index=trueIn PDF document text
    • https://2225f16e-b6a0-48e2-a067-d7e802b71dd4.filesusr.com/ugd/a7ada4_87df6360e3ec46699046845de69150ca.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gifiz/alage_alage_song_mp4.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e5b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5B6 4976 bytes
SHA-256: bad134ca14409d7f3e763ddd17d98f2bbb7e6fc878cac3e0e67cf7f5506ce7b4
font_01_sfnt_off0000f694.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF694 10740 bytes
SHA-256: 0411c3cbb20d66f639b04c295705ed2194a2f82470bb62a673689236a6a02872

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