Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd1947e4bb70ac43…

MALICIOUS

PDF

77.6 KB Created: 2021-04-06 19:24:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4b1a8a8ea7e4687389ebd0178448e12e SHA-1: dd8ccdb234560cdcc7215a05e2c662eeaeafd5be SHA-256: dd1947e4bb70ac43f1479802e8ac20dd6d98e6cc15711f4b61c17f1dd5333885
96 Risk Score

Malware Insights

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

The file is a PDF document that contains an embedded URL pointing to a suspicious domain, identified by ClamAV as Pdf.Phishing.Trojan. The ML classifier also flagged this PDF as malicious. The document body, though heavily obfuscated, appears to be a lure related to search queries, suggesting a phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://resalured.ru/aws?utm_term=are+ceramic+space+heaters+more+efficient
    • https://cdn-cms.f-static.net/uploads/4471958/normal_5fd0d6613a35a.pdf
    • https://cdn.sqhk.co/libegavezu/bCheOid/cheppave_chirugali_film_songs.pdf
    • http://faripofijukevom.mywebcommunity.org/vubosodawuxulimej.pdf
    • https://static.s123-cdn-static.com/uploads/4479691/normal_5ff8a25a134f9.pdf
    • https://cdn.sqhk.co/pikikunifav/ggg8mhc/expert_option_trading_apk.pdf
    • http://tavegumata.sportsontheweb.net/1613031520.pdf
    • https://cdn.sqhk.co/xuxiropuwomo/YWrCvgc/98347856161.pdf
    • https://cdn.sqhk.co/jitolado/jzgchco/rojixemekep.pdf
    • https://static.s123-cdn-static.com/uploads/4449987/normal_5fdcf825da772.pdf
    • https://cdn-cms.f-static.net/uploads/4451949/normal_600fbe23d81e9.pdf
    • https://cdn.sqhk.co/rufebumu/dX0jcgj/xugovumeto.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/098f56aa-434d-4017-b7e7-aabf58160910/what_are_the_three_main_components_cultural_competence.pdf
    • https://bf808793-8b46-4c54-8b11-319763181fa0.filesusr.com/ugd/0d018b_baedd29160764a4f9b31affeeff27ffe.pdf?index=true
    • https://s3.amazonaws.com/vuliwisuwig/what_does_a_legal_memorandum.pdf
    • http://satawakerexe.atwebpages.com/laboratory_apparatus_and_their_uses_with_pictures_download.pdf
    • https://uploads.strikinglycdn.com/files/60d2428a-be41-4cef-93ed-2f8ac4debf0a/what_reading_level_is_miss_peregrine.pdf
    • https://uploads.strikinglycdn.com/files/02cd2924-d153-43ed-98cd-2220e3dbe504/bobaxu.pdf
    • https://b86313a8-447b-404d-ae6d-bc69740d899e.filesusr.com/ugd/e54fc7_e00557e95f2f4075b88a319df54e00bb.pdf?index=true
    • https://s3.amazonaws.com/varolexexus/defense_logistics_agency_uniforms.pdf
    • https://s3.amazonaws.com/wamatasamegu/fugonenijukosigipo.pdf
    • https://uploads.strikinglycdn.com/files/3574d6ef-dce9-4fb2-a198-cb7316ad9775/vasototigilopewejokube.pdf
    • https://s3.amazonaws.com/fuzafuzeruwit/56903769112.pdf
    • https://uploads.strikinglycdn.com/files/4a249913-9b9f-42e9-aefe-6ae5fc4ac26b/calories_in_a_homemade_taco_salad_without_shell.pdf
    • https://48cc712b-de5e-493e-a198-f8962849e22b.filesusr.com/ugd/d2751c_17ec020d821c4e419d9c4c24a18823b9.pdf?index=true
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f089.bin
3dd6587697f87f616ee030471b0fe186361e278e84e0c3bcffb024faccbad824		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF089 5212 bytes
font_01_sfnt_off0001021d.bin
086d994549ececb8c7ef2380c01d208cc07c8b8868c6fd48445b17cb9285f0ed		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1021D 10840 bytes

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