Malicious PDF — malware analysis report

Static analysis result for SHA-256 c6e6cebc1031443a…

MALICIOUS

PDF

74.4 KB Created: 2021-01-19 17:17:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: b372266eba8e3c12f50a2fdcff53be93 SHA-1: 7159a2d3c272f5441c6d653a29a0f4aa58e87521 SHA-256: c6e6cebc1031443ad30f842d2b0be33b4b08f4bc921637472d4a537d55ea7c81
184 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with at least one pointing to known malicious redirector infrastructure. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' and the ML classifier strongly indicate malicious intent. The document body, though heavily obfuscated, contains text related to a 'suspicious activity report police', suggesting a social engineering lure to encourage link clicks.

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
  • 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.
  • 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.
  • 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://ggtraff.ru/aws?utm_term=suspicious+activity+report+police In PDF document text
    • https://cdn.sqhk.co/pavujakorige/geiiijq/basketball_images_free_download.pdfIn PDF document text
    • http://begedotupatato.66ghz.com/mejores_aplicaciones_de_pago_android_2019.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455406/normal_5fbceca079a75.pdfIn PDF document text
    • https://site-1177793.mozfiles.com/files/1177793/my_hero_academia_amino_bio_template.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445103/normal_5fa1f10361e90.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367290/normal_5f890be9b53e0.pdfIn PDF document text
    • https://cdn.sqhk.co/rifusofuwedi/sVfybic/pink_and_white_ombre_nails_short_square.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452853/normal_5fd7d98403484.pdfIn PDF document text
    • https://site-1177469.mozfiles.com/files/1177469/living_room_furniture_sets_ebay_uk.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4419235/normal_5ff7bb231d3cd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409621/normal_5f9df6ecde1b7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407807/normal_5f96544c0b6e4.pdfIn PDF document text
    • https://cdn.sqhk.co/volinafi/hahbW9S/raspberry_pi_2_i2s_pinout.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414848/normal_5fa849769cbf4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446776/normal_5fa5952a15911.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wafubarig.epizy.com/harry_potter_movies_with_malay_subtitles.pdfIn PDF document text
    • http://kipixuge.epizy.com/depito.pdfIn PDF document text
    • http://favirivesez.epizy.com/network_error_blizzard.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_off0000e61f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE61F 5192 bytes
SHA-256: 4c3510eae9e3bf319b4d1d75c559a93dc71e4f06360b07d15099b5223def67c5
font_01_sfnt_off0000f7e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7E1 10588 bytes
SHA-256: 1872230b0951bec494b4bfb102be68482d20fdee22607639b28ac6e7196d108c

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