Malicious PDF — malware analysis report

Static analysis result for SHA-256 68154f7162df7130…

MALICIOUS

PDF

81.1 KB Created: 2021-03-09 14:34:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 43ed965fbd83b99a2ba2c917530a7c8e SHA-1: 590d46f6a303171ab2387f8ee06fd2c3b2d061dd SHA-256: 68154f7162df713048a0acb9b2bd5da6b6b05c78008d1a583715b6b77408ae8c
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs pointing to potentially malicious domains, identified by heuristics such as PDF_SEO_DISPOSABLE_LINK_FARM and ML_NYX_PDF_MALICIOUS. The document body, though heavily obfuscated, suggests a lure related to drawing tutorials, which is likely a pretext to redirect users to these external sites. The presence of these links and the high ML score indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://zajinet.ru/strik?utm_term=how+to+draw+anime+hair+very+easy PDF link annotation
    • https://cdn.sqhk.co/nozedimasav/ifEgdhK/2019_pa_deer_archery_hunting_videos.pdfIn PDF document text
    • http://gufutaca3.xyz/suvozeligagegaloledu15en0.pdfIn PDF document text
    • http://gejokakop.mygamesonline.org/imagenes_de_caras_emociones.pdfIn PDF document text
    • http://bidizujimon.getenjoyment.net/suunto_ambit_sapphire.pdfIn PDF document text
    • http://jinevul.mygamesonline.org/rabbit_holes_in_my_yard.pdfIn PDF document text
    • http://artemk.ru/multi_stream_recycling8qyvb.pdfIn PDF document text
    • https://cdn.sqhk.co/konidadelan/0Miatv3/68642771456.pdfIn PDF document text
    • http://onlyforyou.space/vigujapapavutinaliwugofan2q09i.pdfIn PDF document text
    • https://posalezonekat.weebly.com/uploads/1/3/4/6/134628665/kobik.pdfIn PDF document text
    • https://denibemexe.weebly.com/uploads/1/3/4/5/134597338/8e7c0.pdfIn PDF document text
    • https://sewurinibe.weebly.com/uploads/1/3/4/5/134595705/dda41d62a.pdfIn PDF document text
    • http://tronreserve.online/animal_in_your_room_appotg40.pdfIn PDF document text
    • http://mujabelor.mywebcommunity.org/toshiba_dvr620ku_record_vhs_to_dvd.pdfIn PDF document text
    • http://zuregazezoral.mygamesonline.org/fufesaxel.pdfIn PDF document text
    • http://nemugub.mywebcommunity.org/divamit.pdfIn PDF document text
    • https://fawefugixizim.weebly.com/uploads/1/3/1/3/131383791/zagokidepiborev-fonek-xulotizepuf.pdfIn PDF document text
    • http://saxobupazes.sportsontheweb.net/how_many_hours_do_scag_mowers_last.pdfIn PDF document text
    • https://walegizagoz.weebly.com/uploads/1/3/0/7/130775215/de4c84b6a6.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kikanelomer.onlinewebshop.net/cat_in_the_hat_knows_a_lot_about_that_episodes.pdfIn PDF document text
    • http://ligujizulogi.atwebpages.com/momebefiligunokuga.pdfIn PDF document text
    • http://juborekif.atwebpages.com/asnt_tc_1a.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_off000100c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100C9 5248 bytes
SHA-256: 97e01c63120d48a9265767639be2308cef17d275d76e133774e262ba7faf0b1c
font_01_sfnt_off0001128d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1128D 10600 bytes
SHA-256: 7fe4ade354f73d1a7c4de9b411f52124491fe5ef6ef7cb3e2e48433a2c4a7398

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