Malicious PDF — malware analysis report

Static analysis result for SHA-256 33c3defb832c826e…

MALICIOUS

PDF

76.2 KB Created: 2021-02-28 05:57:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: 83a7162d04ca621f0f27592899d4d79d SHA-1: 505e175be3eb6c5a585fd1c1aaa001978952ef97 SHA-256: 33c3defb832c826e92b7e385472ea3434e8ab2fd8d2c4dba06ab87a0d6d82f60
126 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, many pointing to disposable domains, suggesting a phishing or link-farming scheme. The presence of PDF_SEO_DISPOSABLE_LINK_FARM heuristic further supports this, indicating the PDF is part of a link farm designed to manipulate search engine results or redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://kuzutuzo.ru/wix?keyword=wrestling+buddies+wwe PDF link annotation
    • http://reactivaperu-2020.com/islamic_dream_interpretation_giving_birth_to_a_baby_girl1uh2j.pdfIn PDF document text
    • http://zoluwofemofuper.sportsontheweb.net/tugafudu.pdfIn PDF document text
    • http://lololoj.sportsontheweb.net/what_is_the_natural_movement_of_air.pdfIn PDF document text
    • http://wipunemobak.mygamesonline.org/42682474241.pdfIn PDF document text
    • http://vovpomnim.ru/balanza_comercial_de_mexicowl7ob.pdfIn PDF document text
    • http://excellent-spb.ru/nuwaxajejazodizetitixot9abze.pdfIn PDF document text
    • https://tugofemupufere.weebly.com/uploads/1/3/4/5/134584107/15c45f.pdfIn PDF document text
    • http://mopexaxurip.getenjoyment.net/algorithms_robert_sedgewick_coursera.pdfIn PDF document text
    • http://xepekil.iblogger.org/324283060.pdfIn PDF document text
    • http://wisecreditscore.info/what_is_network_security_basicsumusr.pdfIn PDF document text
    • http://itverys.space/nawadabimagusipazonuregu7qzp8.pdfIn PDF document text
    • http://winoraama.space/dejivibosureg04nx0.pdfIn PDF document text
    • http://flipping-car.online/89642452135406s7.pdfIn PDF document text
    • http://skidki-day.store/86745998100yqnxv.pdfIn PDF document text
    • http://wazumitizun.22web.org/anniyan_film_songs_starmusiq.pdfIn PDF document text
    • https://tubozabuzimez.weebly.com/uploads/1/3/4/8/134878922/628d5de6ba86044.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
    • http://rodaselawowov.rf.gd/bobovolupiverajokolumi.pdfIn PDF document text
    • http://xemunebo.atwebpages.com/famazozoxadu.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_off0000e190.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE190 4800 bytes
SHA-256: cf2ed916f889c17269a07d51be9e23f773f40fa6296b28b5ee98990de49f38ba
font_01_sfnt_off0000f1f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1F9 10408 bytes
SHA-256: d996c49254c56f654d94aa1728724ae0881221e38e56586a2e9a8117ee1952d3
font_02_sfnt_off00011595.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11595 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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