Malicious PDF — malware analysis report

Static analysis result for SHA-256 fcbe160066a49879…

MALICIOUS

PDF

76.3 KB Created: 2021-06-07 00:55:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 52cbe408e13a8d86989e158c5b316106 SHA-1: 8966213d5daa3565f10bfde07d32e742a9774926 SHA-256: fcbe160066a498798fe5524963d4f19acb9b997d4e9f6e041b46e9aa4d2adc1b
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 0.9995

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://pistant.ru/pbw?utm_term=how+to+teach+a+child+to+read+cvc+words PDF link annotation
    • https://dewokiwo.weebly.com/uploads/1/3/6/0/136028273/xofozoxep_wijusenone_paravapike.pdfIn PDF document text
    • https://topekaje.weebly.com/uploads/1/3/4/1/134109010/cf332f0.pdfIn PDF document text
    • https://samojajakab.weebly.com/uploads/1/3/4/6/134696950/vanavobetabigib.pdfIn PDF document text
    • https://lefexaro.weebly.com/uploads/1/3/5/3/135324439/6d3b5664d.pdfIn PDF document text
    • https://wojopegoguw.weebly.com/uploads/1/3/4/6/134690206/7eca416c2.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fukibaso.pbworks.com/f/jewidobibozosoma.pdfIn PDF document text
    • http://pamotekegopa.pbworks.com/w/file/fetch/144472596/42910274864.pdfIn PDF document text
    • http://kemususi.pbworks.com/w/file/fetch/144752412/vooks_teacher_sign_in.pdfIn PDF document text
    • http://pupowivala.pbworks.com/f/babul_meriya_gudiya_audio_song_download.pdfIn PDF document text
    • http://siseraxoru.pbworks.com/f/pexuz.pdfIn PDF document text
    • http://jitilabajeko.pbworks.com/f/harman_kardon_hk195_teardown.pdfIn PDF document text
    • http://tasonupopam.pbworks.com/f/46834448243.pdfIn PDF document text
    • http://subazim.pbworks.com/w/file/fetch/144610734/roblox_hack_2020_get_free_robux_for_android_and_ios.pdfIn PDF document text
    • http://pebokuvog.pbworks.com/f/84311330937.pdfIn PDF document text
    • http://vazufatar.pbworks.com/f/how_to_turn_on_mic_on_discord_pc.pdfIn PDF document text
    • http://vadibun.pbworks.com/w/file/fetch/144438936/the_game_of_thrones_season_1_episode_1_youtube.pdfIn PDF document text
    • http://bevojoluvu.pbworks.com/w/file/fetch/144725235/haier_ac_remote_control_manual.pdfIn PDF document text
    • http://nusuwoxub.pbworks.com/w/file/fetch/144422373/how_long_it_takes_for_tadpoles_to_turn_into_frogs.pdfIn PDF document text
    • http://foxobekizax.pbworks.com/w/file/fetch/144466218/23752937214.pdfIn PDF document text
    • http://lezakoliz.pbworks.com/f/glide_reflection_worksheet_answers.pdfIn PDF document text
    • http://kunixove.pbworks.com/f/rubiks_cube_formula_3x3_telugu.pdfIn PDF document text
    • http://sawanixum.pbworks.com/w/file/fetch/144512061/how_to_write_up_for_insubordination.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_off0000ec83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC83 5140 bytes
SHA-256: db47ca0280de68812e94c3b852576f1e1277425e77c04c97b060b5815acfac07
font_01_sfnt_off0000fe0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE0A 11176 bytes
SHA-256: 2bda75a1c4cd378a269dfc76afdcc647b97e762579002931b1f4004c14bcc2b6