Malicious PDF — malware analysis report

Static analysis result for SHA-256 f364fcc8ebd87d1d…

MALICIOUS

PDF

91.9 KB Created: 2021-03-25 04:29:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: dd3e8044993022e019296271b83f9191 SHA-1: 5c3636b7eb33ea535f6de2bb0a0b9c347bea0601 SHA-256: f364fcc8ebd87d1da057d5a2a00d2d8bbd2c2ceb893001b24204cb4e6aa33449
186 Risk Score

Malware Insights

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

The PDF contains numerous external links, many hosted on disposable domains, suggesting a link farm or phishing operation. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of techniques used to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

Heuristics 6

  • 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 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://jumiwimov.ru/wix?keyword=special+right+triangles+45+45+90+worksheet+key PDF link annotation
    • https://gagezomelebagam.weebly.com/uploads/1/3/1/6/131606069/3d813c3f2dda.pdfIn PDF document text
    • http://serarudipiwuvon.mypressonline.com/wiworokul.pdfIn PDF document text
    • https://jigugupidutugi.weebly.com/uploads/1/3/0/8/130813301/xelopipevowoxaf_tixuduxowojej_xegufanom_xereboluzo.pdfIn PDF document text
    • http://lebojabufi.medianewsonline.com/97517144867.pdfIn PDF document text
    • https://rurefisofe.weebly.com/uploads/1/3/5/3/135325463/gexut.pdfIn PDF document text
    • https://mimasalidapu.weebly.com/uploads/1/3/4/4/134466186/regibul.pdfIn PDF document text
    • https://lazofakivew.weebly.com/uploads/1/3/1/4/131406449/86c93.pdfIn PDF document text
    • http://christinaanddavid2019.com/samsung_scx_4623f_drivers_downloadbsdob.pdfIn PDF document text
    • http://cccckkkkkdd.space/top_synonyms_and_antonyms_listsdqjw.pdfIn PDF document text
    • https://bevazamosip.weebly.com/uploads/1/3/5/3/135345421/zusutegatu_vebapipuse.pdfIn PDF document text
    • https://jepiweluzobadur.weebly.com/uploads/1/3/5/3/135300479/dumunolew-topofaf-vogadimek-xelupituwaxew.pdfIn PDF document text
    • http://lejunuzegakikuv.mypressonline.com/zakidijevapolin.pdfIn PDF document text
    • https://bemazoveber.weebly.com/uploads/1/3/4/5/134512295/gowafemuzubiwuruf.pdfIn PDF document text
    • http://elinekici.online/privilege_level_user_account0firg.pdfIn PDF document text
    • http://barbanapoli.moscow/hunter_leveling_guide_ragnarok_classucoel.pdfIn PDF document text
    • http://awpmode.com/at_what_age_do_fears_about_death_tend_to_be_the_greatest0g9z8.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/kakekojezutok/pivavepituxalifu.pdfIn PDF document text
    • http://jasesazolaf.myartsonline.com/74923460159.pdfIn PDF document text
    • https://s3.amazonaws.com/befarekogol/43883675556.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/864dcfed-1144-457e-8ef7-7e05a62a4913/how_to_reset_petsafe_shock_collar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9a7bb144-3588-4abf-8ad5-069959db915e/woralenewa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0e89d29b-dc9b-4bcd-99e2-ff1923028668/what_anesthesia_is_used_for_oral_surgery.pdfIn PDF document text
    • http://sulijugofogim.onlinewebshop.net/how_do_u_describe_a_rainbow.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8b491142-c8dc-4129-bc3f-06c1aa204b86/asrock_h77_pro4_manual.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011124.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11124 6064 bytes
SHA-256: f48314ec69372f513205e85286ee502afbac0e99c722986bfd3c8b88cd20d403
font_01_sfnt_off000125dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125DD 11556 bytes
SHA-256: b021ac8ef6e3c9a5fe62ce210eb344c0cbe5c6d9c960fd46f3760fb886419443
font_02_sfnt_off00014dcb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14DCB 16064 bytes
SHA-256: 1396562ca3b520584892f4bd50ff39b0722e014cdbc1625119a677b71e1270af