Malicious PDF — malware analysis report

Static analysis result for SHA-256 03ba38ba86314536…

MALICIOUS

PDF

70.9 KB Created: 2021-02-17 07:41:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 7160167787873b237ef012a75f892582 SHA-1: 7f230632b346026f1af7b5604a5d3d290762097e SHA-256: 03ba38ba86314536f27eebac044e87e22e0df2c220be065fbc1833cdce8b8a65
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://yafferge.ru/strik?utm_term=sketchup+make+download+2017'. This URL is likely used to redirect the user to a phishing page or to download a secondary payload. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the presence of a malicious URL and the document's nature suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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.
  • 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://yafferge.ru/strik?utm_term=sketchup+make+download+2017 In PDF document text
    • https://cdn.sqhk.co/nenakowi/gj3Tmra/move_to_ios_after_setup.pdfIn PDF document text
    • https://cdn.sqhk.co/zesonixiv/JYhjhe1/matapekadubap.pdfIn PDF document text
    • https://cdn.sqhk.co/mujexoxa/hahaggv/arcade1up_black_friday_star_wars.pdfIn PDF document text
    • http://popuboloza.22web.org/wallace_stegner_angle_of_repose.pdfIn PDF document text
    • http://tapabafana.22web.org/kujej.pdfIn PDF document text
    • https://cdn.sqhk.co/sivefuxonix/jfme66w/3327787498.pdfIn PDF document text
    • https://cdn.sqhk.co/bopelara/KSIgctW/89871893642.pdfIn PDF document text
    • https://cdn.sqhk.co/domonuxasi/jUygeC9/seed_space_venture_capital.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/tufujifinobiro/que_es_el_movimiento_circular_uniformemente_acelerado.pdfIn PDF document text
    • https://s3.amazonaws.com/livivuvuwugeb/69060780334.pdfIn PDF document text
    • https://s3.amazonaws.com/gofiguj/2018_chevy_equinox_diesel_owners_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/kubafezin/vasaluma.pdfIn PDF document text
    • http://fepirag.epizy.com/77650582821.pdfIn PDF document text
    • https://s3.amazonaws.com/paxivogedewilu/cissp_cbk_4th_edition_free.pdfIn PDF document text
    • https://s3.amazonaws.com/rodigapigeta/lukopoforadome.pdfIn PDF document text
    • http://pefuganut.epizy.com/29282248299.pdfIn PDF document text
    • http://misugivunuzu.epizy.com/12810664884.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_off0000d7df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7DF 5704 bytes
SHA-256: 0cb419766e9f10d8573ccc960e790d5ac2a04c1079bd63253e31704f11cc122b
font_01_sfnt_off0000eb52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB52 10364 bytes
SHA-256: 2db7cfd51d6689d7ee989e2a0228576b2bf24d85ea60862a356a19be3e40fda6

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