Malicious PDF — malware analysis report

Static analysis result for SHA-256 cb5546aa9050bbfa…

MALICIOUS

PDF

79.5 KB Created: 2021-03-23 02:07:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 91e6b0628ba45c91648d9db16f4863c2 SHA-1: b052d9a1e3c07704e958e3857bf57d3f99dbb60b SHA-256: cb5546aa9050bbfae757b5da547639dc7fa3184abaa1a2d280a045fbef1cdf34
164 Risk Score

Malware Insights

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

The PDF file contains a lure for a movie download, which is a common tactic for phishing or malware distribution. The embedded URL `https://maypoin.ru/strik?utm_term=the+martian+movie+download+in+telugu` is flagged as an SEO redirector, indicating a malicious workflow. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or trojan delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) or Microsoft license-boilerplate documents that carry no urgency or charge/dispute escalation.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://maypoin.ru/strik?utm_term=the+martian+movie+download+in+telugu PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4413475/normal_5ff218cd9ecb5.pdfIn PDF document text
    • http://wide-take.top/watch_the_princess_bride_full_online_freeuml2k.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417643/normal_5fc83c0395172.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470828/normal_60307925d56e4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408330/normal_5fe6c85b9dd38.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415742/normal_601df6fdf3c62.pdfIn PDF document text
    • http://storedubai.shop/supinmai2c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402951/normal_60176731d5141.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389394/normal_603730466f299.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4378834/normal_5feb7e9105461.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401976/normal_6011e2c29dc38.pdfIn PDF document text
    • http://idealica-ufficiale.site/5687624594788dxu.pdfIn PDF document text
    • http://inglassrus.ru/which_will_nick_drake5u7iq.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417824/normal_5fc779565e707.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449183/normal_5ffb89fdda48f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447640/normal_5ff5c6952eae1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4461483/normal_5fde193384511.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/eb381966-08ee-4e84-811d-f3cbc2d61e73/why_does_my_chevy_equinox_keeps_overheating.pdfIn PDF document text
    • http://zedovapovakodev.rf.gd/sevixup.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/90db16d8-6a32-4e2a-89b2-bc0a24bbdb3c/beats_solo_pro_wireless_bluetooth_noise-cancelling_headphones_review.pdfIn PDF document text
    • http://zilokujidetomo.epizy.com/angna_padharo_maharani_dj_ringtone.pdfIn PDF document text
    • http://zagenududabeg.rf.gd/black_colour_graphic_design_wallpaper.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/857d0a45-c3a0-4c03-9625-82c56e7cbdf4/how_to_value_a_used_car_in_canada.pdfIn PDF document text
    • http://fovusuru.epizy.com/imperialismo_y_colonialismo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/afa554e3-41ed-428c-96a6-a4bfff9ad998/troy_bilt_2800_psi_pressure_washer_carburetor.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/18e6bf45-ec45-432a-be97-655a82cea602/the_book_thief_sparknotes_part_10.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_off0000f9ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9AD 5160 bytes
SHA-256: b0ea3ed58a6bd1fc3bd7a9fc1905fdbb89f5661c6e3d5274873f6fcb52594399
font_01_sfnt_off00010b23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B23 10748 bytes
SHA-256: cf37fd9d1b97380a78a86a3684e78d641512916325e200cea615821c92e08a79