Malicious PDF — malware analysis report

Static analysis result for SHA-256 15f6060d5de289c9…

MALICIOUS

PDF

81.8 KB Created: 2021-06-13 17:39:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 72123f050feacae08185bf3b3d23ab59 SHA-1: 250c8fab8eafeecf5056ef23abfaadaca6c61b17 SHA-256: 15f6060d5de289c93008bacf7430d92d38f40f7cc9ea542588045ba2f957a128
126 Risk Score

Malware Insights

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

The PDF file is identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It functions as a link farm, directing users to various external URLs, one of which is a known malicious domain. The presence of embedded URLs and the overall structure suggest an attempt to redirect users to malicious sites, likely for credential harvesting or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://catamma.ru/pbw?utm_term=tomb+raider+anniversary+game+top+full+version+pc+games+download PDF link annotation
    • https://fafapiponuge.weebly.com/uploads/1/3/4/6/134692005/woxeranavoton.pdfIn PDF document text
    • https://norogogobizifuk.weebly.com/uploads/1/3/2/8/132816096/xutuvejekutamaj-talukof-kebelozizij-suvero.pdfIn PDF document text
    • https://pizugezufe.weebly.com/uploads/1/3/7/5/137501548/8600436.pdfIn PDF document text
    • https://badazunezibak.weebly.com/uploads/1/3/5/3/135338398/pivonedutizojiz_zonefegofaraf.pdfIn PDF document text
    • https://lawoxotat.weebly.com/uploads/1/3/4/5/134587222/nexoxib.pdfIn PDF document text
    • https://vapovudinawixe.weebly.com/uploads/1/3/1/4/131437980/f0ddca92f9dd.pdfIn PDF document text
    • https://tufefuru.weebly.com/uploads/1/3/4/6/134621659/lirifa.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vedufid.pbworks.com/w/file/fetch/144511449/diferencias_entre_las_teorias_de_piaget_y_vygotsky.pdfIn PDF document text
    • http://gaguwufajij.pbworks.com/f/how_to_print_alignment_page_hp_deskjet_f4480.pdfIn PDF document text
    • http://xujefix.pbworks.com/f/dragon_ball_tenkaichi_tag_team_mod_iso.pdfIn PDF document text
    • http://vananizi.pbworks.com/f/vafojukikinotomesanukuvof.pdfIn PDF document text
    • http://penowita.pbworks.com/w/file/fetch/145145535/think_and_trade_like_a_champion_minervini.pdfIn PDF document text
    • http://maxasol.pbworks.com/w/file/fetch/144729444/73452407517.pdfIn PDF document text
    • http://juzifezazuk.pbworks.com/f/toca_life_vacation_free_download_apk.pdfIn PDF document text
    • http://veniwusuj.pbworks.com/f/widupa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5824d4f7-631d-457c-8585-b96d83309dc9/33035835449.pdfIn PDF document text
    • http://foxubomo.pbworks.com/f/69346704271.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e37fd782-0f97-46ed-82f2-bea0d7ae080d/pupalurawuf.pdfIn PDF document text
    • http://rajejor.pbworks.com/w/file/fetch/144869307/why_were_the_first_four_caliphs_called_rightly_guided.pdfIn PDF document text
    • http://dutamaboxiwa.pbworks.com/f/the_federal_in_federalism_worksheet_venn_diagram_answer_key.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b8dee0f8-7147-43de-9aff-5de7ed71eac4/ap_us_history_chapter_2_the_planting_of_english_america.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_off0000f513.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF513 5820 bytes
SHA-256: d1f9f5f58b33b095e72eca77461efa6bf4cb251f255d77de2c8110ac720610dc
font_01_sfnt_off000108db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108DB 2092 bytes
SHA-256: 6e5de5c6bcb7fdd8c5ca0d25823a8f80e6c764803c1b732dbc9c425a5c0f8ea5
font_02_sfnt_off00011281.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11281 11324 bytes
SHA-256: 89c0d8d34b732d067f58ecc494b21f2b8e4974d306569cff0add116e28813dac