Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ec9d0a9eda1d3b8…

MALICIOUS

PDF

87.4 KB Created: 2021-04-15 01:08:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 439dfa130736b7fc42b295e34f9efb0b SHA-1: fabfd15a8b4715476ccd4a13f3d330ddaef20691 SHA-256: 2ec9d0a9eda1d3b8e6344d2dac3639f6e681dc13db073bc62d6e2977c3e9851e
126 Risk Score

Malware Insights

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

The sample is a PDF file flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, with at least one, 'https://lozipotod.ru/strik?utm_term=whirlpool+quiet+partner+iii+owners+manual', appearing to be a lure for a specific manual. The PDF also utilizes a link farm on disposable hosting, indicating a phishing or malware distribution attempt. No scripts were extracted, but the overall structure and URL usage strongly suggest a phishing attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

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://lozipotod.ru/strik?utm_term=whirlpool+quiet+partner+iii+owners+manual PDF link annotation
    • http://ziwavabewite.66ghz.com/busanakibesuzozawasavor.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422378/normal_60243f07c36c2.pdfIn PDF document text
    • http://pifowovumuwe.medianewsonline.com/physics_formulas_for_class_11_cbse.pdfIn PDF document text
    • http://zuxemesemubozo.mywebcommunity.org/monugadomaworarezawuwazu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417319/normal_60233a7a00fe7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470232/normal_600343899e330.pdfIn PDF document text
    • http://zilixijabukepul.iblogger.org/administrao_financeira_groppelli.pdfIn PDF document text
    • http://mozefiri.22web.org/57693820631.pdfIn PDF document text
    • http://fexodubavilukub.22web.org/bise_sukkur_board_matric_result_2020.pdfIn PDF document text
    • http://jaxorad.22web.org/peter_m._lee_bayesian_statistics_an_introduction.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403143/normal_600131a67ba4b.pdfIn PDF document text
    • http://dudosawiroti.22web.org/cara_mengatasi_selection_is_locked_microsoft_word_2007.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://gukutimaguvuzum.onlinewebshop.net/phonetics_exercises_vowels.pdfIn PDF document text
    • http://mixomexazuvoxod.rf.gd/78099602399.pdfIn PDF document text
    • https://f238abdf-92e3-4651-90df-65b6e8a648d9.filesusr.com/ugd/99965f_c463d387ca044ce893d320ebd7caeefd.pdf?index=trueIn PDF document text
    • https://feedbc21-cb93-402c-9ae2-3476589645d2.filesusr.com/ugd/f3ecbe_ea4cd6b907fa4b1abe76961cb469c28c.pdf?index=trueIn PDF document text
    • https://5e6d3f51-9b35-4a29-baf4-1f036254a461.filesusr.com/ugd/99a8f2_e226da6983dd4c288821397984beac0b.pdf?index=trueIn PDF document text
    • https://fb413987-6e77-4bf1-aaa6-e97eb550fbee.filesusr.com/ugd/108936_a40426f4fd314031b3bf13c53c4acc01.pdf?index=trueIn PDF document text
    • http://kofepiropi.onlinewebshop.net/low_carbon_steel_chemical_composition.pdfIn PDF document text
    • http://veziledijiv.rf.gd/tejejujasebelawugojixif.pdfIn PDF document text
    • http://xupozivuruvuti.rf.gd/digital_to_analog_conversion_notes.pdfIn PDF document text
    • http://xizokenimufewom.atwebpages.com/my_washing_machine_wont_start.pdfIn PDF document text
    • http://labutebumir.rf.gd/whatsapp_new_version_latest.pdfIn PDF document text
    • https://2703069b-a6ff-4ff9-983c-db139a8d76ba.filesusr.com/ugd/8b61cf_555dcb484f43469aa60f9173b21a4179.pdf?index=trueIn 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_off00010740.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10740 5172 bytes
SHA-256: 1d24832068e04cc797c257ec3318dbb0ebf4a579be8481e77dea7e8a18d6b0a6
font_01_sfnt_off000118bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118BB 12476 bytes
SHA-256: 175778956732aa6e2b626752687e6162276ec5c09d3173014305bb8fc13d4cc7
font_02_sfnt_off000141f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x141F5 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2