Malicious PDF — malware analysis report

Static analysis result for SHA-256 7a0edf29d4a691fe…

MALICIOUS

PDF

86.9 KB Created: 2021-03-10 00:11:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 48d47066a270b424035bb92bf45f95e7 SHA-1: ad140b5eac6ff15d5a02978c04f034afbb1a30b4 SHA-256: 7a0edf29d4a691fedcb5ab0106181c60f45e2cf8333cc7dba38518607e684149
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://yafferge.ru/aws?utm_term=annual+leave+payment+calculator+nz'. This URL is likely used to deliver a malicious payload or phish for credentials. The ML classifier also flagged this PDF with a high score, indicating malicious intent. The document body, though heavily obfuscated, contains text related to 'Annual leave payment calculator nz', suggesting a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://yafferge.ru/aws?utm_term=annual+leave+payment+calculator+nz In PDF document text
    • https://cdn.sqhk.co/kubepugemaki/dibbhgd/block_international_calls_iphone_t_mobile.pdfIn PDF document text
    • https://cdn.sqhk.co/tovasodoj/jyA0H5O/79234391401.pdfIn PDF document text
    • https://cdn.sqhk.co/loxowopiv/h7xjcib/huey_helicopter_rides_in_texas.pdfIn PDF document text
    • https://cdn.sqhk.co/zivudasexoni/Krijhgr/xurolisupud.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/786e361f-6665-4309-a2fe-d5301ba45dc5/danby_kegerator_dkc146sldb_parts.pdfIn PDF document text
    • https://s3.amazonaws.com/kugelilizibuwum/corbettmaths_algebra_worksheets.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e349951a-686e-4ab5-b829-d8a8b53151a1/dell_poweredge_r710_datenblatt.pdfIn PDF document text
    • https://s3.amazonaws.com/tinezedu/how_to_start_programming_ios_apps.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/467d2b36-c5df-4bdd-afdd-1020931ff7d9/wogamiziti.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d2150659-2ce8-4813-ae32-29b660db9fd5/58815185349.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/36590c39-dbb9-486d-a220-cbf927aebd33/earthwise_pressure_washer_1500_psi_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/rotowan/ibps_calendar_2019-_20.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b85afe12-25b9-4623-b277-68fe3c466f4d/singular_and_plural_nouns_ppt_for_grade_3.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9e862c68-df7a-40e2-aa86-cdbefd47441f/86838776110.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/87e74d55-ac46-4eae-9e4b-10a7061668f9/36993522885.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/401c30b2-ee04-44a0-b037-24c65b205675/50305777138.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/25245118-aab9-4d36-b220-3bbd4671b5ec/whirlpool_duet_washer_error_codes_f02.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/de19c84d-fc0b-4327-9ce0-014c19568eba/how_to_grow_garlic_from_seed.pdfIn PDF document text
    • https://s3.amazonaws.com/mosezavor/54970282591.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/64d52196-dfa4-4c4e-b048-6cb1772df5fa/67420647126.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f4414f64-5a83-4669-84b8-f6fbf08e4d57/how_are_birds_adapted_to_their_environment.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6cdec9ef-e28a-426c-b083-70cdfe0df526/64627793067.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000109ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109CA 4936 bytes
SHA-256: 3602794433024fd6908e45a78634d0b0a2c76d373708bb19c16d337897cc91f0
font_01_sfnt_off00011a87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A87 10940 bytes
SHA-256: 93d8d0ed35ada3abcb92d90b162109a4842b9b90b7db345b1843e0c418c97260
font_02_sfnt_off0001400f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1400F 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3