Malicious PDF — malware analysis report

Static analysis result for SHA-256 49f1b4f7eab55129…

MALICIOUS

PDF

76.4 KB Created: 2021-03-31 10:43:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-23
MD5: 84ee9e2c26947305aa8acdf827d08d70 SHA-1: bf415d319f73529d5a4d4837006fd0969be76ac7 SHA-256: 49f1b4f7eab55129d7c3039a8bb82524d1334d0922a1d17bb24392e7b21ee06c
136 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that directs users to a phishing site disguised as a search result. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. While no scripts were directly extracted, the presence of external URIs and the nature of the ClamAV detection suggest a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • 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://gimoguvi.ru/award?keyword=refractory+iron+deficiency+anemia+pdf PDF link annotation
    • https://cdn.sqhk.co/dovutiwabule/UEiiUhh/certified_fraud_examiners_manual.pdfIn PDF document text
    • https://cdn.sqhk.co/surodamiz/hdd4Jxa/90473644646.pdfIn PDF document text
    • https://cdn.sqhk.co/wupofolizaj/MNzjcPb/wesumorelerovupodepekej.pdfIn PDF document text
    • https://cdn.sqhk.co/lanamixese/jLBHia9/scp_096_modest_full_gameplay.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/ceea66b4-db54-4e1c-91ab-a8414e801b7c/gradient_of_curl_is_zero_proof.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2ba7971a-43b5-47e8-ac89-8dfbca1e46bb/g_box_q_update.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/53e719ab-dba5-458a-a8d6-a77aa15eebe8/47516736943.pdfIn macro / runtime command snippet
    • https://uploads.strikinglycdn.com/files/aaba4b3a-2f0b-4443-9bb1-1927869a551b/craftsman_garage_door_opener_3-function_visor_remote_control_instructions.pdfIn PDF document text
    • https://s3.amazonaws.com/mikibetiv/imaginary_gift_template.pdfIn PDF document text
    • https://s3.amazonaws.com/kovozenamofox/kufaxalipolinepusabevaw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/65ed7e40-acff-49aa-9bcb-e2b4e834bdf7/41861384450.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/73c95607-86be-4490-89d8-13822a8a27e8/does_tricare_cover_childbirth_if_not_married.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2b4c44f7-0df4-4809-a0dd-69e7d76ef0a1/medios_de_comunicacion_en_el_salvador_wikipedia.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/96cdf0b0-281c-4925-a9d8-ccb8c57cf926/beauty_and_the_beast_flute_duet_sheet_music_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3aadf5c7-25ae-4b3e-8a43-476d479ea428/definicion_de_derechos_humanos_para_nios.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7585dd94-0084-4138-aa3c-b521e303e7c8/48356623031.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
    • https://uploads.strikinglycdn.com/filIn macro / runtime command snippet
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e1d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1D1 4988 bytes
SHA-256: 80c23835d747e335ae5c0cbff455306a23b966a0a44add3c23a5457465ad144d
font_01_sfnt_off0000f2b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2B9 10388 bytes
SHA-256: 6a48cd2c483e07ba59b9dba3c1066c312d33a9cc0a324d27101ac4323044cdac
font_02_sfnt_off0001161a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1161A 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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