Malicious PDF — malware analysis report

Static analysis result for SHA-256 544fc21acd9ddeab…

MALICIOUS

PDF

76.1 KB Created: 2021-03-17 05:16:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 843ed35a1a61095a0f4713dd7a0fe803 SHA-1: a3d56d402322688aff5739d3440179f460d7c373 SHA-256: 544fc21acd9ddeab89c6935aff1460875c550d38ec48ebff4eb33ede47b8f364
166 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF file contains numerous embedded links to suspicious domains, identified by heuristics like 'PDF_SUSPICIOUS_LINK_LURE' and 'PDF_SEO_DISPOSABLE_LINK_FARM'. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to exploit vulnerabilities or redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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
  • Image-heavy PDF with invisible link to suspicious domain high PDF_SUSPICIOUS_LINK_LURE
    PDF is a small image-heavy lure with invisible link annotations that send the user to a suspicious high-risk-domain URI. This matches credential-phishing carriers where the visible document is only a prompt and the real collection flow happens on the linked website.
  • 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/award?keyword=chuy%25E1%25BB%2583n+pdf+th%25C3%25A0nh+file+%25E1%25BA%25A3nh PDF link annotation
    • http://nout-sale.site/love_story_1970s_songa3942.pdfIn PDF document text
    • http://alex-travel.moscow/zavarimajixopoxuboqired.pdfIn PDF document text
    • https://nupowanekajotut.weebly.com/uploads/1/3/0/8/130815303/fagikotonukoger.pdfIn PDF document text
    • http://wuxetij.mypressonline.com/jozoniferewumulul.pdfIn PDF document text
    • https://moketotal.weebly.com/uploads/1/3/4/3/134315425/fobupati.pdfIn PDF document text
    • http://subbellassecret.com/tearoom_trade_means__ends_in_social_researcht1yxl.pdfIn PDF document text
    • https://cdn.sqhk.co/ralapogifur/LibjaBQ/disney_getaway_blast_events.pdfIn PDF document text
    • http://lofajemami.sportsontheweb.net/79006908426.pdfIn PDF document text
    • https://gimepaponu.weebly.com/uploads/1/3/4/6/134614910/dopurodab_povuw.pdfIn PDF document text
    • https://vovikadu.weebly.com/uploads/1/3/4/5/134587732/pujenuvitilajarikul.pdfIn PDF document text
    • http://wonder-ita.fun/69308996395c45zs.pdfIn PDF document text
    • http://help-violation.com/game_of_war_fire_age_download_for_android5kink.pdfIn PDF document text
    • https://jejaxome.weebly.com/uploads/1/3/4/4/134443668/dironuve.pdfIn PDF document text
    • http://bavimobuxadu.medianewsonline.com/bikiturosoluvilijinev.pdfIn PDF document text
    • https://kepiloxuxamife.weebly.com/uploads/1/3/0/7/130740378/fuxopiveru.pdfIn PDF document text
    • http://tugrull.com/what_are_the_8_notes_on_the_musical_scalepcyxp.pdfIn PDF document text
    • https://cdn.sqhk.co/jadepibake/pigYjat/69104024399.pdfIn PDF document text
    • https://cdn.sqhk.co/xulawajikigi/2hhgNMJ/12543407664.pdfIn PDF document text
    • https://cdn.sqhk.co/buzaxelubot/IUlRifC/rap_hip_hop_ringtones_free_download.pdfIn PDF document text
    • https://cdn.sqhk.co/gepeduvo/RcChggT/rudigoxujobev.pdfIn PDF document text
    • https://ranilabat.weebly.com/uploads/1/3/5/9/135999147/619878adec28831.pdfIn PDF document text
    • http://batmbatm.ru/caballo_de_troya_4_gratisu30qy.pdfIn PDF document text
    • http://ig-supportcenter.xyz/the_selection_book_3_read_online_free6jak2.pdfIn PDF document text
    • http://ijmalan.xyz/45264301485q683v.pdfIn PDF document text
    • http://hurleyshamburgers.com/char-broil_3-burner_propane_gas_grill_with_side_burner_reviewfsea1.pdfIn PDF document text
    • https://tewafegode.weebly.com/uploads/1/3/5/3/135350941/7811764.pdfIn PDF document text
    • https://muwewixobajigu.weebly.com/uploads/1/3/4/3/134312624/xirezi_watotibizig_pelaxunolole_xexigumopivite.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://dezinolabebosod.atwebpages.com/latila.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_off0000e04f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE04F 5360 bytes
SHA-256: ee1b1ed592e912f0f70993c13029adb70ed2859c04ba9b2a44bacea81acc1ea2
font_01_sfnt_off0000f1bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1BB 20084 bytes
SHA-256: 22f533b164181158e7f09ad1dd0420d77f64fba45718b27bbc8d5e578db7ab38

Open this report in the interactive analyzer, or submit your own file for analysis.