Malicious PDF — malware analysis report

Static analysis result for SHA-256 df12071aebd633fa…

MALICIOUS

PDF

77.7 KB Created: 2021-03-31 08:49:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: b0a5ef3b99b1f4701420a0d2d33433ff SHA-1: b0e96dcfc894837366dab737854070470f7f33ff SHA-256: df12071aebd633faa7df9053ccc4bf0387baa72cb3d3fdfb9c3a151c173ffa96
156 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

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
  • 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://bologen.ru/award?keyword=mpcb+schneider+catalogue+pdf PDF link annotation
    • http://meetsalle.xyz/criminal_law_vs_civil_law_canadatgnn8.pdfIn PDF document text
    • http://shopmzm.site/what_happens_in_chapter_6_of_the_givertingy.pdfIn PDF document text
    • https://kodabovoxalomas.weebly.com/uploads/1/3/5/3/135340354/xazeputij.pdfIn PDF document text
    • https://sozuleku.weebly.com/uploads/1/3/5/9/135962343/1610346.pdfIn PDF document text
    • https://novesorolawo.weebly.com/uploads/1/3/4/8/134886892/6474956.pdfIn PDF document text
    • https://cdn.sqhk.co/bebumula/7if2nih/dowaserukokux.pdfIn PDF document text
    • https://voxonororipesap.weebly.com/uploads/1/3/5/3/135383222/368d2.pdfIn PDF document text
    • http://ridunculus.com/how_to_setup_playstation_gold_headset_on_pcc8lgp.pdfIn PDF document text
    • http://questotzvezd.space/how_to_pair_audio_technica_at-lp60xbt5l5do.pdfIn PDF document text
    • https://cdn.sqhk.co/ximegawaso/DBUiieK/61769117491.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/jivuxo/list_comprehension_python_filter_duplicates.pdfIn PDF document text
    • https://21e323bd-7fdd-46e9-a6c7-4880e76d7610.filesusr.com/ugd/0a51c1_5e2ec6fff8a2486b9b226ddf34bd348f.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/figugipopar/beekeeper_s_handbook_free.pdfIn PDF document text
    • https://s3.amazonaws.com/wakuzidi/chakka_bajana_songs_naa.pdfIn PDF document text
    • https://s3.amazonaws.com/figidireki/alp_revised_answer_key_sarkari_result.pdfIn PDF document text
    • https://0ecef3a8-5193-4df1-8dcb-1b7dd0f2be2a.filesusr.com/ugd/e6092c_249581ccadc94bcb9ba7269f64e3ef37.pdf?index=trueIn PDF document text
    • https://75ca6b5e-a470-4e0e-8004-b00a9f1721b4.filesusr.com/ugd/1e4819_91f11e7b507142769e25a07c50b479aa.pdf?index=trueIn PDF document text
    • https://f8d4b294-f952-4a11-85e8-0a3036f9bdaf.filesusr.com/ugd/ad8f3a_ec001d423cd041cc8873aeb6622a9fea.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xozeb/zozes.pdfIn PDF document text
    • https://s3.amazonaws.com/rexogeguxosix/avengers_all_movie_in_tamil_tamilrockers.pdfIn PDF document text
    • https://s3.amazonaws.com/pogolo/free_notepad_compare_plugin.pdfIn PDF document text
    • https://bb74f61c-7045-47bf-9a7e-968101ee373e.filesusr.com/ugd/81ef4b_03fd267a389f4ddfaaad3c3d0be08f80.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/sagotomagin/sundara_kandam_in_telugu.pdfIn PDF document text
    • https://s3.amazonaws.com/jopomodilamego/view_stored_wifi_passwords_android.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dcad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCAD 5560 bytes
SHA-256: f47b34f5362a0ca99827bcebdf337170b1a60d7c46a1bba84a6688ed338dd1ba
font_01_sfnt_off0000ef94.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF94 10024 bytes
SHA-256: 34f26ecdb1ba600263cbad76251b182fb14fdbe6587717dd7691dbf62d59df22
font_02_sfnt_off00011208.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11208 16164 bytes
SHA-256: 4bd16c8abd39118228c1571b0005d4eb3b3e943e572fd92a2a80cfcb7b749349

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