Malicious PDF — malware analysis report

Static analysis result for SHA-256 411033dace49cb7b…

MALICIOUS

PDF

72.2 KB Created: 2021-03-13 23:51:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 84d12c2931948e1b55b017e0312ebd23 SHA-1: 42060ff66f50e86acce2638f28be2d8ee5d00c37 SHA-256: 411033dace49cb7b5001658e121cd26dc1406b4b433c459224e1e22745179cd8
154 Risk Score

Malware Insights

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

The PDF contains multiple heuristics indicating malicious intent, including ML classification and ClamAV detection as a phishing trojan. It embeds external URIs, notably 'https://zajinet.ru/wix?keyword=super+smash+flash+unblocked+6969', which is likely the malicious landing page. The document body, though heavily obfuscated, suggests a lure related to game downloads, aligning with phishing or malware distribution tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 7

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) or Microsoft license-boilerplate documents that carry no urgency or charge/dispute escalation.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/wix?keyword=super+smash+flash+unblocked+6969 PDF link annotation
    • http://savineme.mywebcommunity.org/ziweridipitesajupuki.pdfIn PDF document text
    • http://vnds-super.space/barron_writing_for_the_ielts_free_download3ydw3.pdfIn PDF document text
    • http://arthromedro.xyz/dragon_ball_z_free_episodes_downloadrjqvh.pdfIn PDF document text
    • http://jedusajinud.mygamesonline.org/mivukujemivigu.pdfIn PDF document text
    • http://nibakelenixezas.getenjoyment.net/wahl_clipper_guards_size_12.pdfIn PDF document text
    • http://top-salez.site/hbr_guide_to_buying_a_small_business4gb7k.pdfIn PDF document text
    • http://gosoxegekiri.mywebcommunity.org/zamazolil.pdfIn PDF document text
    • http://jorowijedo.mywebcommunity.org/46338986275.pdfIn PDF document text
    • http://majafapabukores.iblogger.org/american_gods_cast_season_2_episode_3.pdfIn PDF document text
    • http://vetobiz.sportsontheweb.net/59080152715.pdfIn PDF document text
    • http://mugukix.mygamesonline.org/cuales_son_las_preposiciones_en_espaol.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/ba9131d9-c0e7-4e5f-9ca2-0031acc9834c/does_nordictrack_ever_go_on_sale.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/617f35a6-d70a-42ad-aecd-7f2c573b49f7/stihl_fs90r_trimmer_parts.pdfIn PDF document text
    • http://rusiwebo.epizy.com/niwobuwexezanex.pdfIn PDF document text
    • http://mekasesajiw.onlinewebshop.net/in_the_afterlight_book.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2973729a-0242-4de9-9be2-92ee3aa3b8aa/student_bio_data_form.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c0b933b6-38b2-4fd6-a48f-dcb2d4f383d5/38442005735.pdfIn PDF document text
    • http://wugujub.onlinewebshop.net/52366854097.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/40188e79-3cdc-4e25-95c8-fb0fef48b9de/73196523275.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/94d7bdaf-0382-4961-9172-66a9ce4e4404/how_to_turn_off_eset_smart_security.pdfIn PDF document text
    • http://gozosowizopuk.rf.gd/craftsman_air_compressor_replacement_parts.pdfIn PDF document text
    • http://vesunebujel.rf.gd/hp_photosmart_d110a_price.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_off0000da60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA60 6012 bytes
SHA-256: c384cc21420b6cb6e7f893759e7436ee0371028fd04c4ccebfd0246005945918
font_01_sfnt_off0000ee99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE99 10940 bytes
SHA-256: 8548b606d1995f2d6a26019c4fe4c9ed34e5e2d8e426cf3381204250a0ae20d6