Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5d5aa072c0ad7cf…

MALICIOUS

PDF

116.5 KB Created: 2021-05-11 02:59:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 7de60f40e184e2ca4f54305d1a79d771 SHA-1: 529236c689ac1df752dcb0da5838987deaed1030 SHA-256: e5d5aa072c0ad7cf9dac352084dd3c71a6a78057f0583fdc31c223a6b8cf9466
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9905

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://resalured.ru/strik?utm_term=samsung+a2+core+volume+key+not+working PDF link annotation
    • https://cdn.sqhk.co/noxivudeva/lhcjxij/saneniximugunejupekiv.pdfIn PDF document text
    • http://copytoshka.ru/1657942981mf02x.pdfIn PDF document text
    • http://koteyarn.moscow/la_vida_precoz_y_breve_de_sabina_rivas_pelicula_completa_gratis9sww4.pdfIn PDF document text
    • http://sutiwejepeb.22web.org/curriculum_vitae_examples_south_africa.pdfIn PDF document text
    • http://arm-watch3.club/646647556547623x.pdfIn PDF document text
    • http://markettop.pro/amoeba_sisters_cell_transport_answersu7k3j.pdfIn PDF document text
    • https://cdn.sqhk.co/kezavilageg/BhhJfij/wiffle_ball_toss_carnival_game.pdfIn PDF document text
    • http://itclick.pro/91219977555x16ah.pdfIn PDF document text
    • http://trickyturkey.com/busabisasitofamozexoruhm75z.pdfIn PDF document text
    • http://f13x.xyz/embraer_120_manualjlkjq.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409118/normal_5ff563fa1dcb9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4377098/normal_6007e09d7a5f8.pdfIn PDF document text
    • http://electorat.org/dd_one_shots_for_3_players668a6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465024/normal_600dea15227ff.pdfIn PDF document text
    • https://cdn.sqhk.co/molivovuki/6ijjiaC/piperilumoliteduwelowu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455390/normal_60315be5cc64a.pdfIn PDF document text
    • http://bimufufedo.22web.org/forrest_m_mims_iii_getting_started_in_electronics.pdfIn PDF document text
    • http://gesarizu.iblogger.org/what_plants_are_edible_in_the_arctic.pdfIn PDF document text
    • http://ourfanz.com/fufafau8qdj.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460447/normal_5feddfacd157f.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://jeduxotikeg.rf.gd/child_temperament_types.pdfIn PDF document text
    • http://pevivudawof.epizy.com/the_pilgrims_progress_tamil.pdfIn PDF document text
    • http://jatuxijor.epizy.com/full_catechism_of_the_catholic_church.pdfIn PDF document text
    • http://fatixoromagik.epizy.com/10875756026.pdfIn PDF document text
    • http://biledimetiwen.epizy.com/ohio_guidestone_lorain_county.pdfIn PDF document text
    • http://kirezujanavibos.epizy.com/77891864418.pdfIn PDF document text
    • http://lenopebimuzisit.rf.gd/tofapakunokazigif.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00015855.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15855 5552 bytes
SHA-256: 0f2b102369bc296b4015af32c80a7458475d1de5a1c72795681347a4f9f32e0b
font_01_sfnt_off00016b36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16B36 11536 bytes
SHA-256: b4398a605ba3156deca0ddf53452606c1873d615749c1989879132d9e5597503
font_02_sfnt_off000192da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x192DA 20236 bytes
SHA-256: 3c27b13abf9e619e52608ec77d43bc1281f87869d4f1154880df677ebd7ca65f
font_03_sfnt_off0001b57f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B57F 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71