Malicious PDF — malware analysis report

Static analysis result for SHA-256 22a77324b72c5a9f…

MALICIOUS

PDF

86.1 KB Created: 2021-05-23 05:44:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 98cb1742dac86278ebc9294567a8cc29 SHA-1: 3dbdc33cce2c2a1527584040dd74bff1f5099698 SHA-256: 22a77324b72c5a9fdf7820f52dbf5efd75a08ccb60db6031b77be5a27dd3e544
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, a common tactic for SEO poisoning and phishing, with one primary URL identified as a potential malicious redirect. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and heuristic firings suggest it's designed to trick users into visiting malicious URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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/strik?utm_term=music+theory+for+young+musicians+grade+1+pdf+free+download PDF link annotation
    • https://kufidadifijerid.weebly.com/uploads/1/3/1/4/131407945/lotede-puvizesiroga-fixoruset-pewitegusok.pdfIn PDF document text
    • https://zipibolusoxa.weebly.com/uploads/1/3/4/6/134627603/vaxoxiko.pdfIn PDF document text
    • https://juxosejuw.weebly.com/uploads/1/3/4/4/134481686/jadutebewenov.pdfIn PDF document text
    • https://vokobilozo.weebly.com/uploads/1/3/4/2/134235622/gigegizisekanov.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/a3f51c8c-0725-4fe3-a921-0f4ff84e4575/vusadeliwozofafikone.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f4dee58c-7169-4e6f-af07-966c05a25d68/chevy_nv4500_transmission_rebuild_kit.pdfIn PDF document text
    • https://s3.amazonaws.com/remuv/90430379068.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ab8ccc0b-c2de-4a23-9c64-7e5767942e03/how_to_learn_python_as_a_beginner.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f0b9e1cc-e49e-4998-9396-4ac4dc4d6f5a/fs-gt3c_firmware_update.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0897d974-e139-428c-adba-d59653d82f50/easy_does_it_idiom.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f80560cf-6152-4264-a61d-a7b703c11525/76199847853.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8ee5b858-926d-487b-9ce1-7123064c427a/skyrim_uninstall_unofficial_patch.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/40d7005c-cd89-44c2-b7e3-bff6f5b20d70/how_to_describe_a_double_bubble_map.pdfIn PDF document text
    • https://s3.amazonaws.com/xisefowu/hp_pavilion_zv5000_audio_driver_windows_xp.pdfIn PDF document text
    • https://s3.amazonaws.com/bomifabipi/78919428892.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c139caf6-0301-4338-9cf8-8e6ca55c4139/percy_jackson_and_the_lightning_thief_audiobook_chapter_22.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/973fff9a-e838-4a4f-a7f2-1ccbe93ca1da/how_to_find_the_angles_of_a_trapezoid_given_side_lengths.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9fafedf5-8456-4296-a4c9-82a97806ed65/how_to_activate_pro_tools_on_ilok_cloud.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b001b87b-014f-476d-bd2b-af3b1e523542/free_birth_chart_compatibility_report.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c2dcd50b-2fa0-49a8-83ee-01d6e12f2be9/mabisewonoxopixobetupixa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b66d5ab7-3013-4255-964e-0d0cf537a2fd/asrock_h77_pro4-m_specs.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9019b61f-ade2-4783-b230-fea0a5c738fa/kasugo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e2595031-8bbb-458d-b219-bde239970f18/como_se_dice_buenos_dias_en_nahuatl_wikipedia.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_off00010fd4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FD4 5820 bytes
SHA-256: 14b22274d75c1e7101a190609644ff3116f24135ba0c91598a17d1a7009da5c2
font_01_sfnt_off000123a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123A3 10868 bytes
SHA-256: e219981d84a8e7efa9b65c98be5aeeb03559a7c73558f031521914abee197b15