Malicious PDF — malware analysis report

Static analysis result for SHA-256 6966b917b650c27c…

MALICIOUS

PDF

74.6 KB Created: 2021-03-24 11:17:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 770f24191466312499b3b12362d0b9d0 SHA-1: 67c3f9eab01289ae94ca8369331b79b1a3aeeaa0 SHA-256: 6966b917b650c27c611b9bd3acf3a2d67ff0a37bf4772a349b804992926cbe35
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains a large number of external links, identified as a 'PDF_SEO_LINK_FARM', with one prominent URL being https://ponafet.ru/123. ClamAV also detected the file as 'Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0'. The presence of numerous external links suggests an attempt to redirect users to potentially malicious content or phishing sites, aligning with spearphishing attachment tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://ponafet.ru/123?utm_term=chakram+movie+hd+video+songs
    • http://anrostore.ru/m-audio_oxygen_49_mkiv_49-key_midi_controller5yaoz.pdf
    • https://bopexetijajab.weebly.com/uploads/1/3/1/4/131411078/ruwewikebig_rovis_fukupudexebelo_pejepu.pdf
    • http://gadetebes.sportsontheweb.net/accouchement_dystocique_memoire.pdf
    • http://axecheat6.xyz/tolilejizoty94t5.pdf
    • https://vowebaxuzifov.weebly.com/uploads/1/3/0/7/130738870/xezogok.pdf
    • https://japafapu.weebly.com/uploads/1/3/1/4/131437770/fojofeleguzo.pdf
    • http://wide-do.top/92735576695682wy.pdf
    • https://toroborelap.weebly.com/uploads/1/3/4/8/134867907/sukulunep_lipuxefegomupe_tobelemujiwa.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/sorapobuk/24584489018.pdf
    • https://s3.amazonaws.com/wulotugadag/what_is_the_best_exercise_when_you_have_a_bad_back.pdf
    • https://s3.amazonaws.com/jinotugiwomo/xekibabumajo.pdf
    • https://s3.amazonaws.com/panalipolifod/canon_ip110_series_on-_screen_manual.pdf
    • https://bcd7deca-fd5d-492b-a220-d373ca515bc9.filesusr.com/ugd/12f4eb_578ad24e5c4449d59e77f8ee386ef92d.pdf?index=true
    • https://s3.amazonaws.com/kotenu/1725062484.pdf
    • http://zobuwijezad.onlinewebshop.net/dewuvomo.pdf
    • https://1c92f6d8-19eb-429c-9239-1cf6be91372f.filesusr.com/ugd/cc1a03_f471fadf531446bebbfe043985bf4176.pdf?index=true
    • https://s3.amazonaws.com/kevava/patch_compliance_report.pdf
    • https://c63359c4-faa5-40af-ad11-254ddd3d100c.filesusr.com/ugd/838c33_4d9bacf9316b4516b4850e55fbf21d22.pdf?index=true
    • https://s3.amazonaws.com/livivuvuwugeb/how_much_do_interior_designers_make_per_hour.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e664.bin
caf637b1fc2638623170c3a5eef411d7a444d592acef474294b18d64dea2f3ae		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE664 5236 bytes
font_01_sfnt_off0000f80b.bin
4bad0a2565843b9c38096acd4717f63e01fc56352dce8f4051737f91ccc23ca5		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF80B 10828 bytes

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