Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0b3e4db4dae3121…

MALICIOUS

PDF

76.9 KB Created: 2021-03-07 12:42:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 633c01c7f453f66cb0ad410c4e156168 SHA-1: e9d8a11250368c0c8299bd37dcf70d624cca83e8 SHA-256: f0b3e4db4dae31216ea55f969a5bc678daef87523f8121985f13712ebb35c9de
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are dynamically generated or point to suspicious domains, indicating a link farm or phishing attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The embedded URLs likely serve as lures to phishing sites or malware downloaders, aligning with the Spearphishing Attachment technique.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • 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://bologen.ru/strik?utm_term=sunbeam+bread+machine+model+5891+recipes PDF link annotation
    • https://bawosizegidaw.weebly.com/uploads/1/3/1/4/131411147/267ba76252e5.pdfIn PDF document text
    • https://cdn.sqhk.co/noxobabidof/gjgjhhb/sticker_maker_for_whatsapp_download_apk.pdfIn PDF document text
    • http://nitanupemil.mygamesonline.org/katawa_shoujo_hanako_route.pdfIn PDF document text
    • https://nukoxola.weebly.com/uploads/1/3/1/3/131380146/96d4ad4.pdfIn PDF document text
    • http://lomidal.mygamesonline.org/ketuzesurosif.pdfIn PDF document text
    • http://kumujobu.iblogger.org/fufepimisifuxudumidiworel.pdfIn PDF document text
    • https://cdn.sqhk.co/zoxowowi/idljhjc/wirebefawekapijisugiju.pdfIn PDF document text
    • https://vejelajaluseno.weebly.com/uploads/1/3/5/3/135392022/0da1206bd4a3.pdfIn PDF document text
    • https://sojetupeduxagi.weebly.com/uploads/1/3/1/8/131856567/tebuvomovetuze_losanulubaveg.pdfIn PDF document text
    • https://tusuwijajibu.weebly.com/uploads/1/3/4/5/134517525/wenuluvenamimop.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xenezipulugiji.atwebpages.com/aage_barati_peechey_band_baja_mp3_song_download.pdfIn PDF document text
    • https://s3.amazonaws.com/kozibowisenatu/hand_of_fate_2_devil_guide.pdfIn PDF document text
    • http://zoriwotub.rf.gd/1906212614.pdfIn PDF document text
    • https://s3.amazonaws.com/livivuvuwugeb/apr_performance_audi_a3.pdfIn PDF document text
    • https://s3.amazonaws.com/gavobawum/bitwise_asset_management_sec_report.pdfIn PDF document text
    • https://s3.amazonaws.com/loneminovu/honey_gain_app_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/mujesogi/kmart_sheet_set_review.pdfIn PDF document text
    • http://bavosezema.epizy.com/force_field_analysis_template_powerpoint_free.pdfIn PDF document text
    • http://felugibesixe.onlinewebshop.net/hp_deskjet_5550_change_ink_cartridge.pdfIn PDF document text
    • https://s3.amazonaws.com/mojivikapeti/hackmaster_5th_edition_gm_screen.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_off0000eea2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEA2 6084 bytes
SHA-256: 75c0b47f8b9dcb091a52455686c79072bf55c3129984a1ed435fbf36dea727b0
font_01_sfnt_off00010327.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10327 10384 bytes
SHA-256: 068691973eed298cee825bad2607f21fd47396612f05ce749e6f1ef40aab7399

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