Malicious PDF — malware analysis report

Static analysis result for SHA-256 3457818a0abf2d60…

MALICIOUS

PDF

75.4 KB Created: 2021-03-14 12:20:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 0605802698c9418c474e9c17dc23fed4 SHA-1: eac7245047a365c7ac49789a28ab90a52e84f8b2 SHA-256: 3457818a0abf2d60a845812454c9117e72fcdd1528e935313c65298058baa9dc
194 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many pointing to disposable hosting, suggesting a link farm designed to redirect users. The document body, though partially corrupted, contains text related to a movie download lure, which aligns with the heuristic findings of a 'download button' lure and the presence of numerous external URIs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://zajinet.ru/123?utm_term=ben+hur+telugu+dubbed+full+movie PDF link annotation
    • https://fujareke.weebly.com/uploads/1/3/5/3/135391043/joxovuxajedup_kazutuka_kedoge.pdfIn PDF document text
    • http://tb-films.ru/how_to_install_realtek_audio_driver_in_windows_7vj0j0.pdfIn PDF document text
    • http://mushygushysayings.com/wordly_wise_3000_book_10_answer_keynmm40.pdfIn PDF document text
    • http://tiktokfrance.fun/61716855367m6vgh.pdfIn PDF document text
    • https://tesafugefiwa.weebly.com/uploads/1/3/5/3/135318727/051b9dda6955f.pdfIn PDF document text
    • https://ruwadegefanum.weebly.com/uploads/1/3/4/1/134108857/zabaxeviseloba.pdfIn PDF document text
    • https://busununivid.weebly.com/uploads/1/3/4/7/134774072/fijesuwuxisupukujo.pdfIn PDF document text
    • https://pesadoxemanuz.weebly.com/uploads/1/3/4/8/134852899/904414.pdfIn PDF document text
    • http://sojipen.22web.org/hcci_engine_seminar_report.pdfIn PDF document text
    • https://mujolimu.weebly.com/uploads/1/3/4/8/134868529/1513844.pdfIn PDF document text
    • https://lunidopufakim.weebly.com/uploads/1/3/4/4/134482460/d765615270a24e.pdfIn PDF document text
    • https://nelemiken.weebly.com/uploads/1/3/4/7/134704654/dozupuxetomafukoxow.pdfIn PDF document text
    • http://tameeniraq.com/36909092682xehab.pdfIn PDF document text
    • http://karnaval.host/d_d_character_sheet_ipadv8e2s.pdfIn PDF document text
    • https://lijipowurop.weebly.com/uploads/1/3/4/3/134314174/832b90dc8e633f.pdfIn PDF document text
    • https://xutonipojoneri.weebly.com/uploads/1/3/4/6/134667901/f69add.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://xavodozijon.epizy.com/is_environmental_science_merit_badge_eagle_required.pdfIn PDF document text
    • http://pagupim.epizy.com/73531480216.pdfIn PDF document text
    • https://s3.amazonaws.com/voropa/bokajovorosoto.pdfIn PDF document text
    • https://s3.amazonaws.com/juzowilipi/divergent_veronica_roth_book_summary.pdfIn PDF document text
    • http://selifesupenikiv.epizy.com/capacity_utilization_factor_vs_performance_ratio.pdfIn PDF document text
    • http://vejabimumen.epizy.com/xadepajumegigiwiriwixodo.pdfIn PDF document text
    • http://fifomivosa.rf.gd/beastmaster_tv_series_season_1.pdfIn PDF document text
    • http://kilisajafe.rf.gd/addons_firefox_helper.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_off0000da1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA1B 5064 bytes
SHA-256: 095f4651909125ac637a78689c163ff92142a5561e3f8003acc508551816d269
font_01_sfnt_off0000eb2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB2C 11316 bytes
SHA-256: dee63cbceef3b4c2d2fb199139f45299f078444f61f0920b40d5296b389799db
font_02_sfnt_off000111e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111E7 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2