Malicious PDF — malware analysis report

Static analysis result for SHA-256 fdf338d43e207f10…

MALICIOUS

PDF

93.6 KB Created: 2021-03-21 05:55:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 0da9e0967febfd496a38c0860635ed0e SHA-1: a11636ee028b258dfb465a0b55f940570de16d25 SHA-256: fdf338d43e207f10c452b7873000ef922cb2e0aa50d314c156efb9bbb7bdc6f0
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many pointing to disposable domains and employing UTM parameters, suggesting a phishing or malware distribution campaign. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a phishing lure designed to redirect users to malicious sites for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9967

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://soxebez.ru/strik?utm_term=english+conversation+exercises+for+adults PDF link annotation
    • http://tesekal.mygamesonline.org/89405335268.pdfIn PDF document text
    • http://znakomstva18x.site/what_are_the_best_exercises_for_strengthening_your_coreiw90b.pdfIn PDF document text
    • https://cdn.sqhk.co/gabironero/hfQ36pv/jozemelaz.pdfIn PDF document text
    • https://cdn.sqhk.co/metusoteliza/Njaijhf/swepco_power_outage_texarkana.pdfIn PDF document text
    • http://gejurabek.getenjoyment.net/earth_slope_stability.pdfIn PDF document text
    • https://cdn.sqhk.co/bulelovuroga/jejjjcj/2237464893.pdfIn PDF document text
    • http://akfb.online/learn_arabic_with_maha_online_coursemenwm.pdfIn PDF document text
    • http://mydenverneighborhoods.com/62849018529zxazq.pdfIn PDF document text
    • http://chestlune.online/80096858554kp28.pdfIn PDF document text
    • http://kobopez.mygamesonline.org/xomitevurijajimemeputid.pdfIn PDF document text
    • http://bratskpravojur.ru/yo_amo_a_paquita_gallego_capitulo_29843mj.pdfIn PDF document text
    • http://rafupofamurawaf.mygamesonline.org/to_live_in_the_borderlands_means_you_literary_analysis.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/timeziso/who_stalking_my_instagram_apk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/470aa081-8ab3-441f-ab1c-ed81cafb3300/how_many_in_a_deck_of_cards_without_jokers.pdfIn PDF document text
    • https://s3.amazonaws.com/tetofamuxulil/xegezimuwababubajipov.pdfIn PDF document text
    • http://gedanenek.epizy.com/jokagezajagunatozurapedi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/75c714bd-4684-4e01-badf-e7a35e07297a/walmart_65_inch_roku_tv_black_friday.pdfIn PDF document text
    • https://s3.amazonaws.com/tejuvonixag/74323898332.pdfIn PDF document text
    • http://rovuritag.rf.gd/ahs_coven_lala_song.pdfIn PDF document text
    • https://s3.amazonaws.com/dukexajuj/absolute_value_test_review_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/db0b37db-d318-4b54-8596-633569268166/pupimuvizufo.pdfIn PDF document text
    • http://fidazel.epizy.com/handwriting_worksheets_printable_for_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d9fd2298-44ee-4d13-a542-cbe2ac70951e/63314731964.pdfIn PDF document text
    • http://nefaped.epizy.com/20970171541.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/598d5b2a-d981-4fc8-8647-b6f360567e97/how_to_clean_a_dyson_dc41.pdfIn PDF document text
    • http://bubopewufifinov.epizy.com/89009467316.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_off00012ed7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12ED7 5368 bytes
SHA-256: 25815ef4c4aabeb863a8f259501865c711aea4dc9a54503dd426747486bcb2a1
font_01_sfnt_off00014126.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14126 11100 bytes
SHA-256: c58205eca0c3a2028bce320135129826355af1d35859f40dee3613663dc8a4c7