Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae5ad118c582a5fd…

MALICIOUS

PDF

93.3 KB Created: 2021-03-12 15:08:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 1ad3b648db3ad87d488c249d659a4df3 SHA-1: 23cb2a0581365fc6aa074b5da3bc0cf493cacc68 SHA-256: ae5ad118c582a5fd7b25055a9ea782ee62c20707feb7b6bc78fac6260b618273
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 0.9950

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://xezojetit.ru/wix?keyword=yumi+ishiyama+mbti+personality PDF link annotation
    • https://cdn.sqhk.co/fepexeguma/hrfTja1/pocket_little_pony_18.pdfIn PDF document text
    • https://rasegopejut.weebly.com/uploads/1/3/4/3/134317160/gujarager-posadodisuxazu-zesitob-gezifibex.pdfIn PDF document text
    • https://vajefusuvujob.weebly.com/uploads/1/3/4/4/134464162/kixilewid_fabumige.pdfIn PDF document text
    • https://cdn.sqhk.co/purovufizu/7G0jjij/fox_cineplex_banning_ca_showtimes.pdfIn PDF document text
    • https://cdn.sqhk.co/letinumi/vUL3phc/farming_simulator_14_joc_online.pdfIn PDF document text
    • http://invitesistem.ru/developing_chinese_intermediate_speaking_course_answersnc7ac.pdfIn PDF document text
    • https://cdn.sqhk.co/mepetiruzi/Ojfhcjh/robupatuvufukex.pdfIn PDF document text
    • https://bexejasofipa.weebly.com/uploads/1/3/1/3/131397997/175906.pdfIn PDF document text
    • https://zolununib.weebly.com/uploads/1/3/0/7/130738801/memifenix_donok.pdfIn PDF document text
    • https://cdn.sqhk.co/rubekafux/iRfjije/games_cheat_codes_gta_5_ps4_unlimited_money.pdfIn PDF document text
    • http://kino-vezde.ru/ginanagafb173a.pdfIn PDF document text
    • https://cdn.sqhk.co/gunonutib/hcvzjLX/61764157553.pdfIn PDF document text
    • http://itclick.pro/character_sheet_creator_onlineb4hjx.pdfIn PDF document text
    • https://cdn.sqhk.co/govazofaj/heb9ifF/bmc_software_stock_quote.pdfIn PDF document text
    • https://zeziruxowajud.weebly.com/uploads/1/3/4/6/134698921/luluj.pdfIn PDF document text
    • http://bahis-sikayet.com/picsay_pro_apk_full_version_free_downloadacxtz.pdfIn PDF document text
    • https://misutinulil.weebly.com/uploads/1/3/1/4/131407711/fekimozibi-filetelen-dunimoru-wetosot.pdfIn PDF document text
    • http://italysummer.space/takukovebojupexulat79gb.pdfIn PDF document text
    • https://polaposegit.weebly.com/uploads/1/3/4/5/134591324/1428917dc.pdfIn PDF document text
    • https://nukofagola.weebly.com/uploads/1/3/4/8/134883999/kigesimuwuze-vefikelawavaji.pdfIn PDF document text
    • https://cdn.sqhk.co/xonepogafix/aRhfFgh/pumpkin_carving_kit_walmart_canada.pdfIn PDF document text
    • https://vanixegufewip.weebly.com/uploads/1/3/4/5/134511125/b07a0caa.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/toliwudalamem/young_goodman_brown_text_dependent_questions_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/rawesaragegugar/confluence_template_variable_current_user.pdfIn PDF document text
    • https://s3.amazonaws.com/jadere/10782216836.pdfIn PDF document text
    • https://s3.amazonaws.com/nakuzafol/nexovasusabolasidebigu.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_off00012546.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12546 3372 bytes
SHA-256: 8948597d91c27468d78c65ada12ed38f1e64f9af485e0d007804c9e127ae6d8d
font_01_sfnt_off0001315e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1315E 5260 bytes
SHA-256: ea5d556bea70340caf0f6fa74446affb3b1bf9e2176faaf93b3676c255e5a2df
font_02_sfnt_off0001431b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1431B 10620 bytes
SHA-256: 816b740f74557363556c2208be3af58dfe1060a4ef8d4762033b42a3a7af605e