Malicious PDF — malware analysis report

Static analysis result for SHA-256 3222afba887fe459…

MALICIOUS

PDF

73.4 KB Created: 2021-03-14 13:21:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 9fe7863e4a686bf958b20848e5d87dd5 SHA-1: 42171886af9d5150cc0b7b44eb239e905deb720e SHA-256: 3222afba887fe4595c3e1e2a4a51ba05edb29af2a267a1f9d5d983955dfc248a
222 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to potentially malicious redirectors or link farms, as indicated by the 'PDF_MALICIOUS_REDIRECTOR_LINK' and 'PDF_SEO_LINK_FARM' heuristics. The ML classifier also flagged this PDF with high confidence. The embedded content, though obfuscated, appears to be a lure related to a 'cadet guide', and the presence of numerous external links suggests an attempt to direct the user to malicious infrastructure for further exploitation or phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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
  • 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 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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=lbhs+afjrotc+cadet+guide In PDF document text
    • https://tigoxugijiwubaz.weebly.com/uploads/1/3/4/3/134315710/308db25ea.pdfIn PDF document text
    • https://cdn.sqhk.co/gujowaxexag/ihijdol/pigirej.pdfIn PDF document text
    • https://teribupugabi.weebly.com/uploads/1/3/4/8/134852699/tiwafemipikofo.pdfIn PDF document text
    • http://pidevinaz.22web.org/xiwarivatixukidegej.pdfIn PDF document text
    • http://fusekimutoxi.sportsontheweb.net/gakalavibamisofeserix.pdfIn PDF document text
    • https://cdn.sqhk.co/fivufotimad/M8fhUgh/lusosewomorimu.pdfIn PDF document text
    • https://cdn.sqhk.co/lasetipulos/ytifjdF/19864426691.pdfIn PDF document text
    • http://mujoxoluvisukid.getenjoyment.net/bpsc_mains_geography_question_paper_2020.pdfIn PDF document text
    • https://resusogid.weebly.com/uploads/1/3/5/3/135346187/ripewaxibipo.pdfIn PDF document text
    • https://bebibamo.weebly.com/uploads/1/3/1/4/131438385/512cdc2.pdfIn PDF document text
    • http://sagewusibuz.iblogger.org/matamoxiwipimugixav.pdfIn PDF document text
    • http://lukanovetefitef.22web.org/jufajutomifux.pdfIn PDF document text
    • http://jivusibofonefud.mygamesonline.org/niwumesi.pdfIn PDF document text
    • https://rubuvewoxuvima.weebly.com/uploads/1/3/4/8/134873715/7070041.pdfIn PDF document text
    • https://cdn.sqhk.co/nugopanage/Kjf8jdk/to_do_list_planner_printable_free.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
    • https://s3.amazonaws.com/paropabaru/bootstrap_3_form_validation_regex.pdfIn PDF document text
    • https://s3.amazonaws.com/gadumagabusodel/nadunamapegidubosepex.pdfIn PDF document text
    • https://s3.amazonaws.com/boxujetanonikuv/dd_5e_lycanthrope_pc.pdfIn PDF document text
    • https://s3.amazonaws.com/mipeboro/poliwujudim.pdfIn PDF document text
    • https://s3.amazonaws.com/fibesezati/zexaripozexajekigodox.pdfIn PDF document text
    • https://s3.amazonaws.com/jigezilor/tower_of_babylon_ted_chiang_ending.pdfIn PDF document text
    • http://tufopabapud.rf.gd/50631960230.pdfIn PDF document text
    • https://s3.amazonaws.com/waduzirader/getixere.pdfIn PDF document text
    • https://s3.amazonaws.com/sogovekevi/woxewelodazelixigezuresik.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_off0000d3e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3E8 5184 bytes
SHA-256: 59939d97fad5e5cdc6ac1a3be3517f1510b18f7d0c5d4595b47bc045564e4e94
font_01_sfnt_off0000e5a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5A5 10888 bytes
SHA-256: 4ea33408b6e16b1e652df84572bd947abd6bdb52f10a1368fb71dca1e2f5f82a
font_02_sfnt_off00010a34.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A34 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361