Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc53e9c3b0ef00f3…

MALICIOUS

PDF

79.6 KB Created: 2021-03-25 05:08:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: 750ba198c880e77e76b258549089c6e0 SHA-1: 8dce8e8367a394d6684176badde533cb5975b98e SHA-256: cc53e9c3b0ef00f39eb67f5c2044737c90b8ecea04640f133ecc2842071ce6e1
126 Risk Score

Malware Insights

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

The PDF contains multiple external URIs, with one specifically targeting printer error codes, suggesting a phishing lure. The ML classifier and ClamAV detection strongly indicate malicious intent. The presence of numerous links, many on disposable hosting, points towards a link farm used to distribute malware or facilitate phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 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/strik?utm_term=hp+officejet+4630+e-all-in-one+printer+error+codes PDF link annotation
    • https://cdn.sqhk.co/norifasil/TupYf1G/joker_wallpapers_for_iphone.pdfIn PDF document text
    • http://xugaguf.mypressonline.com/el_aprendiz_de_brujo_2_descargar.pdfIn PDF document text
    • http://jobware.pro/550007204996edl1.pdfIn PDF document text
    • http://beritox.medianewsonline.com/hirayama_autoclave_hv_110.pdfIn PDF document text
    • http://nomevufaneboja.mypressonline.com/22153336578.pdfIn PDF document text
    • http://ridovise.sportsontheweb.net/power_wheels_dune_racer_extreme_battery.pdfIn PDF document text
    • http://jawixogu.mygamesonline.org/wezigisowukosadiki.pdfIn PDF document text
    • http://wotidoteked.mywebcommunity.org/95880113790.pdfIn PDF document text
    • http://lifelalulenomip.mygamesonline.org/accordance_shelly_crane_portugues.pdfIn PDF document text
    • http://fullstacket.online/zigutokinexopupunuuop0.pdfIn PDF document text
    • https://cdn.sqhk.co/nifijagik/iifrij9/fapuwusefojulid.pdfIn PDF document text
    • http://ketaton.mywebcommunity.org/tasojapadirumiva.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jotuvuresaserex.rf.gd/corner_bakery_bread_and_dessert_maker_manual.pdfIn PDF document text
    • http://rijaren.epizy.com/top_rated_front_load_washer_and_dryer_2020.pdfIn PDF document text
    • http://pabizex.atwebpages.com/78210354272.pdfIn PDF document text
    • http://dezobod.onlinewebshop.net/zesaximefifuzoze.pdfIn PDF document text
    • http://tuwutexo.onlinewebshop.net/garmin_approach_s60_premium_gps_golf_watch_with_black_leather_band.pdfIn PDF document text
    • http://balunepikejevo.rf.gd/beats_solo_3_wireless_club_collection_best_buy.pdfIn PDF document text
    • http://benugafudom.epizy.com/fantasy_football_toolbox_printable_cheat_sheet.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_off0000f7bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7BB 5768 bytes
SHA-256: 794c136cbe6671821071ee677a052636166cc9aff2e8d641504b1d593a17b217
font_01_sfnt_off00010b77.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B77 11020 bytes
SHA-256: fc5a68f9421c230e5a3ba6f5029ad87cdaa883cb8949ce45f7b9233e0b5b2a38

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