Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d55bcc381a4960d…

MALICIOUS

PDF

79.5 KB Created: 2021-03-09 02:23:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: fd932bfd5af2d32ce8f6816eb2254ec2 SHA-1: 17df2b5ce8368528bb59f82d5279185a0e06c23a SHA-256: 2d55bcc381a4960d099bc4482bfcceaf3b3cfbcdfb9f3447fce4d2b3f2584938
186 Risk Score

Malware Insights

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

The sample was identified as malicious by ClamAV and an ML classifier, with heuristics indicating it functions as a link farm. Multiple external URIs were extracted, pointing to potentially malicious domains such as xezojetit.ru and bahis-sikayet.com. The PDF structure and embedded content suggest an attempt to redirect users to these sites, likely for 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/award?keyword=audible+pdf+ios PDF link annotation
    • http://bahis-sikayet.com/bloons_td_5_mod_iosf4u2x.pdfIn PDF document text
    • http://wtia.space/75249284525ge7co.pdfIn PDF document text
    • http://closemaze.com/puminisexexibudirovujuj70vpn.pdfIn PDF document text
    • http://kevesojesofun.22web.org/59518009874.pdfIn PDF document text
    • http://biwijenanun.22web.org/xamigitojanugazabulujasi.pdfIn PDF document text
    • https://durosokikiw.weebly.com/uploads/1/3/1/3/131379956/vasoja_tenepaku_vitogil_jizijemokofas.pdfIn PDF document text
    • http://kudretbozaci.com/compare_and_contrast_social_contract_theory_of_thomas_hobbes_and_john_lockevddvu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379217/normal_60383fe4860da.pdfIn PDF document text
    • http://instapriz365.site/big_little_lies_music_season_2_opening_songa7ja9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373987/normal_60146d3e81bb2.pdfIn PDF document text
    • http://hookup158.fun/46026648719u4shu.pdfIn PDF document text
    • http://freds.space/download_fnaf_ultimate6qwgx.pdfIn PDF document text
    • https://xugowapowafav.weebly.com/uploads/1/3/0/7/130775127/9053603.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374983/normal_602b4dab20768.pdfIn PDF document text
    • http://help-service-support.com/64515921966z07p.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/38b71809-c4f0-4714-a0f0-cadd56e4c978/how_many_quarts_of_oil_does_a_john_deere_gator_take.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/97f46219-2ed8-4dde-9293-07a5120343e9/how_to_make_a_book_jacket_out_of_paper.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6db40f71-f8b9-470e-81d8-8d066099e1d9/past_simple_and_past_continuous_exercise_1_perfect_english_grammar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5458d1c1-5e06-4b2b-b9c3-ace207942c0f/power_electronics_company_in_hyderabad.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8150292d-71ba-4e29-a6fd-6dfafc177b7a/gusugi.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_off0000fb73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB73 4860 bytes
SHA-256: 98d77f1018c3180cdd438c9f8128750f32ddda41d061216a29436fcc29e610d2
font_01_sfnt_off00010c0c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C0C 10800 bytes
SHA-256: b6ad2746e8fc9caf9496c27e9524723dc9dbabb2a4e13f619c7f329425d610d6

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