Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e3a7d1e82854999…

MALICIOUS

PDF

86.2 KB Created: 2021-03-29 18:36:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 1d64973f1400d70f9afd6ea6cb45e3b8 SHA-1: 249618cfab69f17a1c721b58dbb9620bfdb30454 SHA-256: 4e3a7d1e82854999f260e77191cf31e87bcd36b2fc6e5999bb00ca4d23acfedd
126 Risk Score

Malware Insights

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

The PDF file contains an embedded URI pointing to a suspicious domain, identified as a link farm on disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. Although no scripts were extracted, the presence of external URIs suggests an attempt to redirect the user to a malicious site.

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
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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=alberto+moravia+carti+pdf PDF link annotation
    • https://cdn.sqhk.co/xefilelo/hdjdvji/ramilowusovuve.pdfIn PDF document text
    • http://rixanemusijod.mywebcommunity.org/atlas_copco_air_compressor_ga90_manual.pdfIn PDF document text
    • https://cdn.sqhk.co/genamudazunu/gcaiajg/rodozopoxotolozed.pdfIn PDF document text
    • http://rusadezebep.mygamesonline.org/how_many_chapters_are_in_chronicle_of_a_death_foretold.pdfIn PDF document text
    • https://cdn.sqhk.co/wexovezojab/ghijYgg/3d_surround_music_player_apk_free_download.pdfIn PDF document text
    • http://vopagokiniki.mypressonline.com/xovasodikibosugo.pdfIn PDF document text
    • https://cdn.sqhk.co/jumifokujuje/hcJigia/kigazonimilufe.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/0e4b7e77-112d-4554-8d1c-2ceaec0924b8/data_structures_and_algorithm_analysis_in_java_3th_edition_by_mark_weiss.pdfIn PDF document text
    • https://s3.amazonaws.com/fakuguvil/rowoseravaxetapamezidov.pdfIn PDF document text
    • https://s3.amazonaws.com/luborinizu/62252045575.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/387c6761-00e0-4f4e-94b3-fa157895fbab/34093349143.pdfIn PDF document text
    • https://b01cffea-7a05-49e8-9781-04202a21c04b.filesusr.com/ugd/d5d855_4a802b929dee45e9994ffb8722e05558.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fibesezati/gowov.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/446c7a32-0787-469a-9401-57f921aaad7f/pixenuwifubixatuweb.pdfIn PDF document text
    • https://efa91360-7c21-416c-9d60-3189e0beb381.filesusr.com/ugd/42ffc7_3dd33f91f5154d1e9fa7d7281b23ab01.pdf?index=trueIn PDF document text
    • https://3a00e800-a8eb-44ae-aafc-ae9aecab8e06.filesusr.com/ugd/1715bf_77a80e3624e64408929dcd94edaebc0e.pdf?index=trueIn PDF document text
    • https://cf587a47-7c2f-4f55-8bbb-21a4c73503f7.filesusr.com/ugd/8ea597_1b47cf4c1fd243019d30008fb749b67a.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/4eb7b77b-66d4-4d15-9f5f-bc41a7aba528/perimeter_and_area_class_5_worksheets.pdfIn PDF document text
    • https://dbba0f06-1911-40f0-8c80-a2638c7f81cc.filesusr.com/ugd/b13fd1_5e9475bb7c994253965eafcd44d73461.pdf?index=trueIn 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_off0000fc61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC61 5312 bytes
SHA-256: 0a2379af2695f443e0b23c1caf3ed8fe7c3e307ed3d8c974899038e25e4f0618
font_01_sfnt_off00010e5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E5D 12580 bytes
SHA-256: d8fe26e6a137cea521dbe03aa7d64d3f2bdff7cf6896389f38ac76796db59e91
font_02_sfnt_off00013737.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13737 16036 bytes
SHA-256: 9559dd1bd908241551916101fda3d445a26f5c4b506a1423f23393456f9d5940

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