Malicious PDF — malware analysis report

Static analysis result for SHA-256 9858d4d142e5b6d2…

MALICIOUS

PDF

78.9 KB Created: 2021-05-01 17:59:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: dc6ae1729eaee88c63e55731f905606c SHA-1: 193dd30b779edf5c80dfde04cd9799c8269c569d SHA-256: 9858d4d142e5b6d2428e3600f8afcc8d1bb785151b487bd9ae05c28f25cffb17
126 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains numerous embedded URLs, many pointing to disposable hosting, and is identified as a link farm designed to redirect users to potentially harmful sites. The presence of external URIs and the link farm heuristic strongly suggest an attempt to direct users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://xezojetit.ru/strik?utm_term=weight+lifting+exercises+beginners PDF link annotation
    • https://dapoxegimore.weebly.com/uploads/1/3/0/9/130969679/ede4bcfcebf5.pdfIn PDF document text
    • http://mugukix.mygamesonline.org/92280960464.pdfIn PDF document text
    • http://rubyshup.space/ice_hockey_exhibition_game_melbourneqqzc8.pdfIn PDF document text
    • http://goshop32.site/physical_education_crossword_basketball_answers8g2ox.pdfIn PDF document text
    • http://lezapogogaz.iblogger.org/barisal_city_corporation_information.pdfIn PDF document text
    • http://jovepodixowofow.mygamesonline.org/luvig.pdfIn PDF document text
    • http://pet-guru.shop/baby_einstein_activity_jumper_replacement_seatc2qsv.pdfIn PDF document text
    • https://tagopudul.weebly.com/uploads/1/3/5/3/135392217/e77f6375b3e00.pdfIn PDF document text
    • http://help-business-media.com/26285280646ba0rn.pdfIn PDF document text
    • http://nabenopavaz.iblogger.org/choo_mantar_video_song.pdfIn PDF document text
    • https://rogupogadagome.weebly.com/uploads/1/3/1/3/131398605/mererawuruneveveb.pdfIn PDF document text
    • https://vixugusimuxomuj.weebly.com/uploads/1/3/0/9/130969476/raxiko.pdfIn PDF document text
    • http://kuxixepiral.22web.org/jotosijivofufetugajupa.pdfIn PDF document text
    • https://tumunonapuve.weebly.com/uploads/1/3/1/3/131379134/xariranugij.pdfIn PDF document text
    • https://bipagaposelugi.weebly.com/uploads/1/3/4/4/134479594/943537.pdfIn PDF document text
    • http://tufinanegonaj.medianewsonline.com/aztecs_empire_of_the_dying_sun.pdfIn PDF document text
    • http://defulupi.iblogger.org/free_books_on_java_programming_for_beginners.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://rodisasedozax.myartsonline.com/55379869645.pdfIn PDF document text
    • http://vojebijawutirus.rf.gd/game_saint_seiya_awakening_mod_apk.pdfIn PDF document text
    • http://juromozupipoju.rf.gd/how_to_setup_netflix_on_my_sony_blu_ray_player.pdfIn PDF document text
    • http://gulagopafed.onlinewebshop.net/81591013803.pdfIn PDF document text
    • http://vuvuvemalazot.epizy.com/filehippo_winrar_32_bit.pdfIn PDF document text
    • http://wexoxanifew.epizy.com/besoin_en_fonds_de_roulement_normatif.pdfIn PDF document text
    • http://bofutezexo.rf.gd/17134998894.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e87b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE87B 4832 bytes
SHA-256: 2c44d40ae0dad44b7544721466a0890080ecac6103cce5103c2775f996f86973
font_01_sfnt_off0000f8f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8F2 10868 bytes
SHA-256: 34e0baf9c4f5d1e1d6bc73ea817abd1b2dea92b9bebe1fda0023fee11bd1864c
font_02_sfnt_off00011e15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E15 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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