Malicious PDF — malware analysis report

Static analysis result for SHA-256 78ad871fcdefedc0…

MALICIOUS

PDF

115.9 KB Created: 2021-03-21 06:48:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 170acaac7bf55efe67fd6a05cc67af45 SHA-1: dd0093fbd61cc438fc2c459dd54fff022f438c92 SHA-256: 78ad871fcdefedc03f5ef0df998cce05f62c34825da1f9882e9fbfb7accb42df
126 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains numerous embedded URLs, with several pointing to suspicious domains like 'jottigo.ru' and 'c-advance.space', likely intended to redirect users to malicious content. The document body, though heavily obfuscated, contains keywords related to search terms, reinforcing the phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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://jottigo.ru/award?keyword=6th+grade+english+textbook+pdf PDF link annotation
    • http://c-advance.space/2973441040219mq2.pdfIn PDF document text
    • http://xuvaxujogilo.mygamesonline.org/21193598050.pdfIn PDF document text
    • https://cdn.sqhk.co/nijusukelok/giZjihc/rajigopevu.pdfIn PDF document text
    • http://strapslap.online/how_to_short_sell_stocks_on_etradehf86f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4457305/normal_5fcd4fcc9cb8e.pdfIn PDF document text
    • https://cdn.sqhk.co/wijelukifap/fRmiaia/flower_zombie_war_free_download.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378834/normal_60197e35d5ee7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408176/normal_602f2ab2d08ff.pdfIn PDF document text
    • http://useraisins.pro/how_do_i_roast_a_turkey_in_an_electric_roasterrdle4.pdfIn PDF document text
    • https://cdn.sqhk.co/fakineduxafe/hiJBicQ/pixel_train_station_2017.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403417/normal_6047ad316dc34.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464078/normal_601f78ef21f42.pdfIn PDF document text
    • http://tadosuzewamu.medianewsonline.com/can_you_whitewash_with_chalk_paint.pdfIn PDF document text
    • https://cdn.sqhk.co/vasibejovej/b6qJhb0/63208274577.pdfIn PDF document text
    • http://gatorama.fun/bowflex_xtreme_2_se_home_gym_weight5e603.pdfIn PDF document text
    • http://normaa-id.com/47944967096wwv43.pdfIn PDF document text
    • http://gewusoluxul.scienceontheweb.net/printable_applebee_s_menu.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/d43d82cd-9904-4222-a620-268baf91e015/kawogagoleziz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/37c176ed-551c-42cb-9014-cb07cf7c4420/vesiv.pdfIn PDF document text
    • http://rorazizaxaf.atwebpages.com/fexokivuja.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/486debe9-2fd9-4247-b31d-defc843fea43/finite_element_analysis_software_abaqus.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9420b143-d50c-4209-8046-cf185907ea97/baby_gate_walmart.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9e00eae3-996e-4792-840a-1465ef6a0c09/what_is_the_best_radar_detector_on_the_market_2020.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2d98a7e0-822b-4e6c-8209-fb1b87a0827b/cuanto_es_una_pulgada_y_media_en_mm.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5f3a82f7-7d99-41bc-b106-1c80a7727ee7/4_pics_1_word_level_2395.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3aa17d4d-7350-4ddf-9f44-7cde95a9675b/how_to_reset_pioneer_avic-5201nex.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_off00018757.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18757 5636 bytes
SHA-256: 8212983e7fc554f70f647b62206413163899199e4a679900ba7e2eb01222da30
font_01_sfnt_off00019a80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19A80 11868 bytes
SHA-256: 987ca9e6fafcfc32fa8dd6b1aea9e10192603cbd97bd3ee4cf7dffcdb028b697