Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b7c9306a6e81d39…

MALICIOUS

PDF

98.5 KB Created: 2021-03-22 18:26:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 5a5b59ea834776c5228b85c19f8166a7 SHA-1: 213c99357716642839473e21ffc0b3983dc72c08 SHA-256: 2b7c9306a6e81d39423b6f8940ea12606b2b18d55c3a0f863f9c4f0a08db88c7
136 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a redirector link, indicating a phishing attempt for free downloads. The embedded URL `https://golowaki.ru/strik?utm_term=is+30+wcf+same+as+30-30` is identified as the primary malicious indicator. ClamAV also detected this file as a phishing trojan, further supporting the malicious classification.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://golowaki.ru/strik?utm_term=is+30+wcf+same+as+30-30 PDF link annotation
    • https://kutowovazamil.weebly.com/uploads/1/3/4/3/134362820/9704046.pdfIn PDF document text
    • http://rkconstructionsucks.com/tolojivetudkh6p.pdfIn PDF document text
    • https://buxijabis.weebly.com/uploads/1/3/5/3/135329720/6939724.pdfIn PDF document text
    • https://jamolirotiwe.weebly.com/uploads/1/3/4/6/134693152/374201.pdfIn PDF document text
    • https://cdn.sqhk.co/guposidum/D6ajjic/18662531868.pdfIn PDF document text
    • https://cdn.sqhk.co/wofunukasu/c4mYSe3/word_swipe_pic_level_70_answer.pdfIn PDF document text
    • https://cdn.sqhk.co/jesovolavig/lBxmO0b/brick_breaker_mod_apk_revdl.pdfIn PDF document text
    • http://rkconstructionsucks.com/arnold_chiari_malformation_symptoms_after_surgeryrt4k6.pdfIn PDF document text
    • https://wesoxiworikezux.weebly.com/uploads/1/3/1/3/131380467/d6a0f.pdfIn PDF document text
    • https://kalujobad.weebly.com/uploads/1/3/4/3/134390175/rofiletivopogodu.pdfIn PDF document text
    • http://damvglaz2.xyz/how_to_replace_primer_bulb_stihl_fs36drxt9.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pamakejexo.epizy.com/king_crown_template_pattern.pdfIn PDF document text
    • https://s3.amazonaws.com/rebomedug/kyocera_fs_1120_mfp_manual.pdfIn PDF document text
    • http://kodekexonalana.epizy.com/alan_walker_ignite_song_lyrics.pdfIn PDF document text
    • http://lonidur.epizy.com/canalyzer_tutorial.pdfIn PDF document text
    • https://s3.amazonaws.com/gotijejaj/prince_william_county_circuit_court_forms.pdfIn PDF document text
    • https://s3.amazonaws.com/pululusodogi/15684425610.pdfIn PDF document text
    • https://s3.amazonaws.com/safenalavojuwu/wiwowowuda.pdfIn PDF document text
    • https://s3.amazonaws.com/difigomisosak/tipixajatobotabib.pdfIn PDF document text
    • http://kunuwinafedib.epizy.com/berar_finance_annual_report.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_off000131c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x131C4 5264 bytes
SHA-256: 946237e3f9f57f6d0f9f1f6a2919601c81c8f7fedba4aa93f254aa2cadcc17a2
font_01_sfnt_off000143bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x143BC 10756 bytes
SHA-256: 9c2d78e0e5f3f059054bc7e3a0a1a90547ab9b38cf2e9f2dceca620a33b5be4e
font_02_sfnt_off000168f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x168F3 16060 bytes
SHA-256: ae97ebdbf5cb6679ee3ae7f6f8963da9ec2437ada1f672a33085bc8cbe806833

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