Malicious PDF — malware analysis report

Static analysis result for SHA-256 c9761f5949bc9312…

MALICIOUS

PDF

71.0 KB Created: 2021-03-17 05:52:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: a9254731070385b8efe6b22e8c26ddb2 SHA-1: eee629ba6ec4075a052452965e9d3a56f169f3a7 SHA-256: c9761f5949bc93127d9f321e4fa4194cb225c1b509a8aee11cf6b045cad719ab
126 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs, many pointing to disposable domains, and is flagged by ML classifiers and ClamAV as malicious. The document body, though heavily obfuscated, suggests a lure related to academic search terms, directing users to a URL on 'mezovuduw.ru' which likely hosts a phishing or malware payload. No scripts were extracted, but the overall structure and URL distribution indicate a phishing or content-luring attack.

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://mezovuduw.ru/wix?keyword=collisions+covalent+bonding+answers PDF link annotation
    • http://tegubija.mypressonline.com/good_reader_android.pdfIn PDF document text
    • http://itanah.space/college_algebra_placement_test_sample_questionsc8jt6.pdfIn PDF document text
    • http://yellownatural.space/7113690585szykn.pdfIn PDF document text
    • http://aviabileti.ru/emperor_palpatine_meme_templatelppdk.pdfIn PDF document text
    • http://thiswaytovogue.com/18557946272q7yro.pdfIn PDF document text
    • http://tisimewifexumi.iblogger.org/gowawekugaboxi.pdfIn PDF document text
    • http://potawuzaj.medianewsonline.com/85450128378.pdfIn PDF document text
    • http://winfreeiphone.xyz/37874547373u2cdf.pdfIn PDF document text
    • http://remontlegko.info/how_much_does_it_cost_to_fix_service_engine_soon_lightqyrdp.pdfIn PDF document text
    • http://fomilexavekol.22web.org/pakuwibufibilokeso.pdfIn PDF document text
    • http://kibizife.iblogger.org/99219296041.pdfIn PDF document text
    • http://luwepetewegumot.iblogger.org/the_name_above_all_names.pdfIn PDF document text
    • http://businessoutsourcing.info/37958090068a1vfy.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/ragejufa/64572735601.pdfIn PDF document text
    • http://gobavaduxa.epizy.com/sheetrock_walls_or_ceiling_first.pdfIn PDF document text
    • https://s3.amazonaws.com/muvazi/wilepeluta.pdfIn PDF document text
    • http://kesekerezox.epizy.com/california_driver_handbook_2018.pdfIn PDF document text
    • http://dudufimapu.epizy.com/autosomal_recessive_inheritance_worksheet_answers.pdfIn PDF document text
    • http://gilotekovipani.rf.gd/anointing_of_the_holy_spirit_wigglesworth.pdfIn PDF document text
    • https://s3.amazonaws.com/setaxilitozuko/49744455730.pdfIn PDF document text
    • http://bibobega.epizy.com/lunanofasokefefiju.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_off0000da28.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA28 5304 bytes
SHA-256: 098d83c1b1d360109862308a7fe94d614e8c6cd9eb8c93c761a711336ca02f04
font_01_sfnt_off0000ec4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC4B 10028 bytes
SHA-256: 1800df32c713f3a0ca7385288a2cf23fb9af556ea3e749a02c82a25503e0736e

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