Malicious PDF — malware analysis report

Static analysis result for SHA-256 059227ce634f43e7…

MALICIOUS

PDF

79.8 KB Created: 2021-05-01 22:52:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 7ea3308214672eed8e7e555f39a8201b SHA-1: 289108d984c02038ccc898dbe9415cb81a17deeb SHA-256: 059227ce634f43e7276f87fc673750810c04dd19e5c5663d08217330e9957052
136 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URL that redirects to a domain designed to appear as a download site for Dell drivers, a common lure for phishing attacks. The presence of external URI and SEO redirector heuristics further supports this attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://golowaki.ru/strik?utm_term=download+dell+optiplex+755+audio+drivers+windows+7 PDF link annotation
    • http://reliables.ru/positive_reinforcement______________and_negative_reinforcementjdbfd.pdfIn PDF document text
    • http://reduslim-europa.site/giluzuvegivubolodixaxeric3j2n.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414494/normal_5ffd39afd06a5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456663/normal_601743661f945.pdfIn PDF document text
    • http://sayfelengs.space/how_much_is_a_camera_wortho8plj.pdfIn PDF document text
    • http://bestcreditcheck.info/bollywood_new_mkv_movies_freeuem53.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421461/normal_6023df882ee5c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421983/normal_602ceab91f06e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462344/normal_6035e14bdd245.pdfIn PDF document text
    • http://pedron.fun/91893494445xh6hd.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/vovopafubipu/ninanokukevebofuxibino.pdfIn PDF document text
    • https://s3.amazonaws.com/fujadabez/83527776157.pdfIn PDF document text
    • https://s3.amazonaws.com/lazesej/free_keynote_pitch_deck_templates.pdfIn PDF document text
    • https://s3.amazonaws.com/nojemi/76410537288.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/324bf2a5-b01b-424c-acf3-42c6f70dcd05/merifugizifegunexewoxodor.pdfIn PDF document text
    • https://s3.amazonaws.com/rudelazifizuvo/mirutidigutezo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/53eecd5a-c983-4309-9838-8dd8a9f89cbb/fixedupetumawokopaf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0393810f-4cfb-4120-badb-c8c9ca48024f/genre_film_list.pdfIn PDF document text
    • https://s3.amazonaws.com/xijilesuzuxo/megapolis_city_building_simulator_apk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/717fc599-f5da-4cbb-9006-b3a2c1c6ffb9/rival_electric_food_slicer_1030v_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dd9e6786-e41d-40b0-8db4-43df46c24304/caltrans_design_information_bulletin_88.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/21e3b339-9f9d-4c17-a635-bc4a5e6e612d/pentair_intelliflo_variable_speed_pool_pump_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/tozaduliwubega/98054480667.pdfIn PDF document text
    • https://s3.amazonaws.com/mipizaju/97612305698.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_off0000fb79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB79 5376 bytes
SHA-256: 5830d5519f34855ca8dd88effa42296efb99d91852bf5ebf38dc38a3ba44fbad
font_01_sfnt_off00010df9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DF9 10208 bytes
SHA-256: 06d0b88d63df99bc7e082f92d516226702ef20505da6bdb472065b1ece827704