Malicious PDF — malware analysis report

Static analysis result for SHA-256 6294a642c9b0da12…

MALICIOUS

PDF

101.3 KB Created: 2020-12-25 17:45:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 8802c31bb7d2d9dd294aa5848f73dc03 SHA-1: b932b719fbc741610dfef8ded3f4f57996505202 SHA-256: 6294a642c9b0da12e46a09180e40bae13bf3d82698cfc1aced736502a2d970dd
214 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous embedded links, with at least one identified as a known malicious redirector. The heuristic firings indicate a link farm and a phishing/trojan detection by ClamAV. The primary attack pattern involves directing users to malicious infrastructure, likely for further exploitation or credential harvesting. No scripts were extracted, but the embedded links are the main indicators of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9888

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://gettraff.ru/123?utm_term=what+is+poha+in+english In PDF document text
    • https://cdn-cms.f-static.net/uploads/4448538/normal_5fae0df6afd68.pdfIn PDF document text
    • https://gadabuji.weebly.com/uploads/1/3/4/7/134715747/papulenuro_fusibov.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402252/normal_5fd140bd2655f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462362/normal_5fb7bdaa22793.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366947/normal_5fb675cd75d6b.pdfIn PDF document text
    • https://sosufafa.weebly.com/uploads/1/3/4/8/134862430/3795665.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388819/normal_5fca98e6d594d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365599/normal_5f8ab42db6a0b.pdfIn PDF document text
    • https://lisamotakix.weebly.com/uploads/1/3/4/3/134308999/ded4eeb675a.pdfIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://smc.org.in)MeeraRegularMeera2016SMC7.0.0+20171102HussainIn PDF document text
    • http://smc.org.inhttp://smc.org.inIn PDF document text
    • http://www.indictrans.orgIn PDF document text
    • https://uploads.strikinglycdn.com/files/56fadac5-0c3e-407a-a2db-42f0a8122506/magical_tail_kitsune_pathfinder.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7e6481c6-0ae1-44f9-8079-284f5f48d913/for_the_beauty_of_the_earth_hymn_tune.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://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text
    • https://gitlab.com/smc/meera/blob/master/COPYINGIn PDF document text

Extracted artifacts 10

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_006_off00011bd3.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x11BD3 4400 bytes
SHA-256: e90e41a99f0c2c1683b3bdbfb5c47b3509e27eb8c194b03f6cadee8cdb4ab4d4
font_00_sfnt_off0000dedd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEDD 5000 bytes
SHA-256: 3257147f341259019643c90502e08ca472f15525a23023f4eeb480138ccfeec3
font_01_sfnt_off0000efed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFED 2716 bytes
SHA-256: a040f0e1057b5d2451dc1c21668590edf5ab3eda83bf6204b2a1aebfe24726ca
font_02_sfnt_off0000fb4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB4C 4552 bytes
SHA-256: 6601bcc30fb15f092a435307ef049d688a2e0229a78bd9d4a03b1cf5fc009596
font_03_sfnt_off000109f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109F5 4764 bytes
SHA-256: e9fa5c4cb0a954bf76a57cb22bcbd0993aec6967bc441446ff681b09ce23dbce
font_05_sfnt_off00012bdc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12BDC 2416 bytes
SHA-256: 509d92edae5e25a2983903ff52b30b55c12714f3b2f77e781029d6a4533c712a
font_06_sfnt_off000136c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x136C4 3992 bytes
SHA-256: e9db3bde59f38def29014813955d6f914e1ea05a70209c15d43caec85883a532
font_07_sfnt_off00014321.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14321 11044 bytes
SHA-256: 6acf9f664eea8ce2d843576e43f70aaf93b49a5e3988a76c0b7209d38c240edc
font_08_sfnt_off000168dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x168DD 3428 bytes
SHA-256: c74aa943dfac89608f442013c51f3362ce1a9414b0efd7f3484ba16e8437e1ed
font_09_sfnt_off00017652.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17652 3868 bytes
SHA-256: 6bf129187578d0915aec5cd35e8771e703477ea848eacb0ecc44d39aa83580d5

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