Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e2efcabc9e3adf4…

MALICIOUS

PDF

84.1 KB Created: 2021-04-08 05:13:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fa38d32fae7885d77f1c1b30c76a0c5a SHA-1: d2c524dbf638af7ced38101daf4d8c39ad033b19 SHA-256: 5e2efcabc9e3adf49b52cec9c2d4f74dc868c1431637da2ced2c34209288145e
126 Risk Score

Malware Insights

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

The PDF contains numerous external URIs and is flagged by ML classifiers and ClamAV as malicious, indicating a phishing or malware distribution attempt. The document body, though heavily obfuscated, contains text related to a 'slow cook' guide, likely a lure to disguise the malicious intent. The presence of multiple disposable domains and link farms suggests an effort to evade detection and distribute payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://pelibifir.ru/strik?utm_term=how+to+use+slow+cook+on+instant+pot+duo
    • http://metarapuw.mypressonline.com/the_sanford_guide_to_antimicrobial_therapy_2020_46th_edition.pdf
    • http://wimudevereru.sportsontheweb.net/absite_review_surgery.pdf
    • http://nasufulorejuwe.mywebcommunity.org/vibibefum.pdf
    • https://woxawilafuzuve.weebly.com/uploads/1/3/4/6/134669094/42caa5d927.pdf
    • https://cdn.sqhk.co/zegetaru/ihgicgd/pac_man_world_2_game_boy_advance.pdf
    • http://jonebosu.mywebcommunity.org/pifewijenasaru.pdf
    • http://paxezimusosesa.scienceontheweb.net/antenna_theory_analysis_and_design_4th_edition_solution_manual.pdf
    • https://gubetixe.weebly.com/uploads/1/3/4/3/134314982/sifavixaja-mujizaliba-zufenun-subutofotog.pdf
    • http://mewanomape.iblogger.org/how_the_metric_units_for_length_volume_and_mass_are_related.pdf
    • http://bamirajewenexo.medianewsonline.com/what_are_the_objectives_of_assessment_in_social_science.pdf
    • https://vuduzilir.weebly.com/uploads/1/3/1/8/131857383/9654827.pdf
    • http://repovor.22web.org/adobe_reader_windows_7_free_cnet.pdf
    • https://jedawakebikota.weebly.com/uploads/1/3/4/7/134715316/bcecfe40eb.pdf
    • https://zoseduzarososu.weebly.com/uploads/1/3/2/7/132740870/72f2e50773.pdf
    • http://suvuxivenorum.mypressonline.com/54927084909.pdf
    • https://cdn.sqhk.co/tinolefowi/btjdtqx/fiwani.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://wufikemofumop.atwebpages.com/48730775261.pdf
    • http://ketaxijos.rf.gd/accurate_english_a_complete_course_in_pronunciation_free.pdf
    • http://labireninofut.epizy.com/52954685999.pdf
    • http://gupatevefojip.myartsonline.com/magisterium_book_1.pdf
    • http://tozilajata.epizy.com/71244196770.pdf
    • http://vunonam.atwebpages.com/79169465328.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fddc.bin
c9f76076f59ce24d6e6872f8dffc2447340a99e3d33930eb48b5c642d4e5e0fa		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFDDC 4968 bytes
font_01_sfnt_off00010ee2.bin
c3aafc14c55a89e7cc453251dd8d55331be8f5c329c33c146902ebc58ade37af		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10EE2 11244 bytes
font_02_sfnt_off000134d7.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x134D7 4324 bytes

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