Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc382bfa499ce236…

MALICIOUS

PDF

76.0 KB Created: 2021-05-08 06:57:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 0c36b669d9d160f4e94eee9ff8d40126 SHA-1: b11d89fce86f5e163d546e017f51d498fc851502 SHA-256: fc382bfa499ce236ad35e8414c3dcbe699cec3073a8dbe5fc563fdab805b5cf1
186 Risk Score

Malware Insights

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

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 0.9990

Heuristics 6

  • 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.
  • 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://fokemale.ru/strik?utm_term=the+clean+light+is+flashing+on+my+whirlpool+gold+dishwasher PDF link annotation
    • https://cdn.sqhk.co/kewawukufiju/ghoMjdk/laurea_scienze_della_formazione_primaria_bergamo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473056/normal_600e2818a76ca.pdfIn PDF document text
    • https://cdn.sqhk.co/wadalibituge/hgjeUlE/balance_sheet_format_under_llp_act.pdfIn PDF document text
    • https://cdn.sqhk.co/gesimefav/jTK7ghW/bluff_my_call_free_app_download.pdfIn PDF document text
    • http://towexiwi.sportsontheweb.net/44121158255.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465919/normal_5ff75981a1068.pdfIn PDF document text
    • https://cdn.sqhk.co/lomasamube/dYbXhiC/pro_microphone_app_iphone.pdfIn PDF document text
    • https://taxudomajifi.weebly.com/uploads/1/3/4/1/134108655/gezanodibewebok_pojajajisaxoti_forapozakujozig_mevokitizeje.pdfIn PDF document text
    • http://setopin.mypressonline.com/network_cabling_standards_and_practices.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408460/normal_5ff8c8a819446.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4499334/normal_600f42949b8cc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414672/normal_60256fa8afb20.pdfIn PDF document text
    • http://tufofol.medianewsonline.com/bhagavatam_in_kannada.pdfIn PDF document text
    • https://xinefozi.weebly.com/uploads/1/3/0/7/130775465/efa4e1c3b2.pdfIn PDF document text
    • https://lugijuvumefabi.weebly.com/uploads/1/3/4/7/134761930/bewon.pdfIn PDF document text
    • https://fiwugepupuladav.weebly.com/uploads/1/3/4/7/134740110/8854357.pdfIn PDF document text
    • https://cdn.sqhk.co/vefuwatak/mXifmhd/10044264835.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://12c9c681-cafc-4f88-93da-cb6f471fd49a.filesusr.com/ugd/f09a9d_aa40f06e2da54ce6b7f5715d71836e42.pdf?index=trueIn PDF document text
    • http://puwokamavureme.rf.gd/69758064503.pdfIn PDF document text
    • http://jeromixowo.epizy.com/nikon_m_308_scope_specs.pdfIn PDF document text
    • https://61736296-a7da-4228-a4f2-5a582bd9a3aa.filesusr.com/ugd/1c12ee_44d3c5dde701434bb95068607b09af02.pdf?index=trueIn PDF document text
    • http://zewadomi.myartsonline.com/what_is_the_most_suitable_theme_for_the_metamorphosis.pdfIn PDF document text
    • https://e1ca4115-fb55-43f9-84f1-eaf814f8c83f.filesusr.com/ugd/18122d_3813337790e64929be330df518af548b.pdf?index=trueIn PDF document text
    • http://xemigososefof.atwebpages.com/baseromeziw.pdfIn PDF document text
    • http://tezitap.rf.gd/adobe_sign_android.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_off0000e7f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7F0 5712 bytes
SHA-256: 1114439f14dd05055352c9c98eee86da1f3bed44c7d8f4388052fa66cf9e28df
font_01_sfnt_off0000fb4e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB4E 10736 bytes
SHA-256: 6b21169213cf10d32bac485f340fb765f5f23a76a550970df73be0c119aafa99