Malicious PDF — malware analysis report

Static analysis result for SHA-256 a4561aa09d4e06a7…

MALICIOUS

PDF

73.0 KB Created: 2021-03-09 22:03:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 551dec08ea40a6309ba6b32f043a97f0 SHA-1: 02424ac189c20df5b7515b824851a3c629e6fc07 SHA-256: a4561aa09d4e06a7a029ced01ab2b3aebe2782bd963fffce05b6e36b5aa438ee
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs pointing to disposable domains and link farms, a common tactic for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were directly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to potentially harmful content, likely as part of a phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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/123?utm_term=comic+book+template+png PDF link annotation
    • https://cdn.sqhk.co/tisufupujeli/iNGjccl/fitness_girl_dance_play_mod_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/tatidukigag/g1x1K5O/winavevuvefibexoxidosijo.pdfIn PDF document text
    • http://kvyovk.xyz/upc_mail_einstellungen_androidrgh2g.pdfIn PDF document text
    • https://cdn.sqhk.co/ravawiku/jdihglF/tafomatudiluzi.pdfIn PDF document text
    • https://cdn.sqhk.co/gomurabog/iebji4T/statistical_inference_text_book.pdfIn PDF document text
    • http://sumapewub.getenjoyment.net/98196689689.pdfIn PDF document text
    • https://cdn.sqhk.co/watexoba/hsEifen/vudifesilugifinibutuk.pdfIn PDF document text
    • http://show-visitor.xyz/what_does_marginalized_population_meanrvz2y.pdfIn PDF document text
    • http://towufato.mywebcommunity.org/laferavudokanejuborotuj.pdfIn PDF document text
    • http://yazansoft.com/genudedukau7168.pdfIn PDF document text
    • https://cdn.sqhk.co/govazofaj/45ijhgg/diskdigger_photo_recovery_apk_free_download.pdfIn PDF document text
    • https://cdn.sqhk.co/nugizape/dfZlgf1/30315757852.pdfIn PDF document text
    • http://bibuzikufaje.mygamesonline.org/how_to_use_logitech_wireless_keyboard_k400.pdfIn PDF document text
    • http://fezelaradelemuj.22web.org/classes_in_java.pdfIn PDF document text
    • https://cdn.sqhk.co/kigowabalo/RjcZKr2/bagoxiboxetolojetazuza.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sapakebozo.rf.gd/electrons_in_atoms_crossword_puzzle_answers.pdfIn PDF document text
    • http://diretoroj.rf.gd/how_to_change_overhead_garage_door_code.pdfIn PDF document text
    • http://kesewalasefikef.epizy.com/23055917562.pdfIn PDF document text
    • http://suzufesa.epizy.com/bernal_diaz_del_castillo.pdfIn PDF document text
    • http://miviguwi.epizy.com/84028742952.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_off0000e21e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE21E 5088 bytes
SHA-256: b437016e139deaa0832bb14e08a5e25a1f516ef8270eab1daa1d29495c90c1e7
font_01_sfnt_off0000f35f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF35F 10360 bytes
SHA-256: 28cb4c0fee1e76201d4ef36c99e71756a5296158fa79365a92b779af57a3c8ee

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