Malicious PDF — malware analysis report

Static analysis result for SHA-256 1152505a0e2086e8…

MALICIOUS

PDF

81.9 KB Created: 2021-04-02 06:02:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: f5b879b6da03080c16c48d612d8b61f9 SHA-1: b3f5f7a1c327de3e275c488d31914d145be9b671 SHA-256: 1152505a0e2086e85bf5c08578248a0420f364413331f352cd3dc29ebc54679f
184 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with at least one pointing to known malicious redirector infrastructure. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to redirect the user to phishing or malware-hosting sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9950

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://dafemum.ru/wix?keyword=2000%2527s+comedy+movie+trivia+questions+and+answers In PDF document text
    • http://wotedogupowu.sportsontheweb.net/ejercicios_pronombres_y_adjetivos_posesivos_en_ingles.pdfIn PDF document text
    • https://cdn.sqhk.co/wefegiwezon/giicJpL/fmk_online_guide.pdfIn PDF document text
    • https://toxejezewigi.weebly.com/uploads/1/3/4/5/134513259/2524134.pdfIn PDF document text
    • https://cdn.sqhk.co/lonubugogere/CqAzGii/stickman_animated_stickers_on_instagram.pdfIn PDF document text
    • https://cdn.sqhk.co/fiporalisu/tTShdqj/warzone_update_patch_notes.pdfIn PDF document text
    • https://cdn.sqhk.co/gotakavapu/iehetid/76571990642.pdfIn PDF document text
    • https://tabivivefevevu.weebly.com/uploads/1/3/4/8/134889686/8842993.pdfIn PDF document text
    • http://fegitodepepax.iblogger.org/notirakol.pdfIn PDF document text
    • https://tozadifoxu.weebly.com/uploads/1/3/4/9/134904498/nizezorizitotuzonibo.pdfIn PDF document text
    • http://puduvab.sportsontheweb.net/lenguaje_corporal_ejemplos.pdfIn PDF document text
    • http://soxezujep.iblogger.org/manual_de_ingles_avanzado.pdfIn PDF document text
    • http://rijebipimaba.getenjoyment.net/bridge_over_troubled_water_piano_solo.pdfIn PDF document text
    • https://gefizubumob.weebly.com/uploads/1/3/4/4/134473977/lixufu_buwitof.pdfIn PDF document text
    • https://rimedugomo.weebly.com/uploads/1/3/0/7/130740195/cf9db801e.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://fulovefodib.epizy.com/channel_7_tv_guide_yesterday.pdfIn PDF document text
    • https://s3.amazonaws.com/zuniverijesud/amma_nanna_telugu_audio_songs.pdfIn PDF document text
    • http://fuxunowelujuxa.atwebpages.com/komotokegipujule.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/03397055-4527-4508-b94c-2359ec0adc39/jivuxatafalorofiwujet.pdfIn PDF document text
    • http://fefuvorezikoko.epizy.com/how_many_hours_does_it_take_to_be_a_journeyman_electrician.pdfIn PDF document text
    • https://s3.amazonaws.com/tibanepoxilibud/tezinuzoresu.pdfIn PDF document text
    • https://s3.amazonaws.com/kosipefojaw/convert_to_tiff_ccitt_t._6.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b79a6b80-be2d-46fc-9506-8b23463d7f47/intraday_trading_strategies_forex.pdfIn PDF document text
    • https://s3.amazonaws.com/woneketelak/xosetapemegisewur.pdfIn PDF document text
    • https://s3.amazonaws.com/dubiditiginowo/75633373804.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4c7f32dc-a5f3-4ff3-9cdb-41d8fb77fe03/how_to_check_mn_driving_record.pdfIn PDF document text
    • http://gudujezakolomu.onlinewebshop.net/difference_between_attitude_and_behaviour.pdfIn PDF document text
    • http://lugubukegi.epizy.com/sejofodefumetituni.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_off0000f1a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1A7 5528 bytes
SHA-256: f9b4409ce5d7fe93a732470866ed82069505eb657b8913baa490ae47b20bff2a
font_01_sfnt_off00010469.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10469 11368 bytes
SHA-256: 9d74b4b3853dd35818dbe8ee9f0c8375e91fc952bce806510904e5604edbbd9a
font_02_sfnt_off00012af8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12AF8 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176