Malicious PDF — malware analysis report

Static analysis result for SHA-256 2fa53abdc768b12d…

MALICIOUS

PDF

92.4 KB Created: 2021-03-11 12:17:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 47f3d1ccd4f6ab7785c8966d20c453d6 SHA-1: 694368c178f9a054f51ada101d66c716364af2a2 SHA-256: 2fa53abdc768b12dfbacf4267f63bd513d62f9710b4149bce048533a75e19730
136 Risk Score

Malware Insights

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

The sample is a PDF file flagged by ML classifiers and ClamAV as malicious. It contains an embedded URL that appears to be a lure for downloading a document, and a heuristic indicates it's a 'Password-protected archive handoff' lure. This suggests the PDF is designed to trick the user into downloading a password-protected file, which is a common tactic for evading security gateways.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://lozipotod.ru/award?keyword=clementina+suarez+biografia+pdf
    • https://cdn.sqhk.co/guranotup/H0nRhgb/fun_facts_about_earth_moon_and_sun.pdf
    • https://cdn.sqhk.co/gejixoneku/JicZYy0/cake_decorators_around_me.pdf
    • https://static.s123-cdn-static.com/uploads/4450898/normal_5fc8ebf8d8b98.pdf
    • https://cdn-cms.f-static.net/uploads/4410985/normal_601ed7db14ede.pdf
    • http://dogalijun.scienceontheweb.net/jufaxama.pdf
    • http://gimatadokij.mygamesonline.org/88078288661.pdf
    • https://cdn.sqhk.co/muzorefu/dl3hfLC/78236859003.pdf
    • http://nurokojo.mypressonline.com/present_and_past_tenses_elementary_exercises.pdf
    • https://cdn-cms.f-static.net/uploads/4380382/normal_602f6bb8ac123.pdf
    • https://static.s123-cdn-static.com/uploads/4458124/normal_6000d8aacaf38.pdf
    • https://static.s123-cdn-static.com/uploads/4473622/normal_60047af7eee89.pdf
    • http://xamawigokoke.mygamesonline.org/5010450342.pdf
    • https://cdn.sqhk.co/xiwasazafu/iib8DI8/history_channel_vault_apple_tv.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/gezizefefififa/50479496089.pdf
    • https://s3.amazonaws.com/sisaxu/29261992427.pdf
    • https://4a39c6c9-989b-4d11-b2d8-cc0becc7f193.filesusr.com/ugd/ef0078_8842544cbf85417cae17b2fe628a6e48.pdf?index=true
    • https://13fad4bf-7224-44b3-802b-16842e97d241.filesusr.com/ugd/b14664_9cf5a4aa6b7d484eaa3925cd9e4cabdd.pdf?index=true
    • https://uploads.strikinglycdn.com/files/9ec696ce-91a4-4131-bb7a-5b1c676805ca/how_to_relieve_neck_tension_at_home.pdf
    • https://27f1a270-5048-4778-87f0-574dfe85248a.filesusr.com/ugd/b7306e_82b53d4b7d934348b4cf37119653e9cd.pdf?index=true
    • https://uploads.strikinglycdn.com/files/0f964b94-d747-4be7-9400-00bc6a9b7943/zipofededalej.pdf
    • https://s3.amazonaws.com/pipaneku/foragijiropen.pdf
    • https://3df06c22-1e8a-4082-8cc2-a0fdc0609706.filesusr.com/ugd/d86e81_a55f21bbfc864b5b8140cebb11fa7d3e.pdf?index=true
    • https://s3.amazonaws.com/kakekojezutok/lawewiradezimekemi.pdf
    • https://s3.amazonaws.com/tazibabebamep/xuzarijuj.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_off00012ae0.bin
149daab83aa07231d517fc8daa1126bd61f81b6098b0875a9a71dac17bd3fd32		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12AE0 5456 bytes
font_01_sfnt_off00013d4f.bin
db157dc398cbe6b46eac5142bf639f8062c02b4a7ceddc73fede1c6a10454ae5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13D4F 11312 bytes

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