Malicious PDF — malware analysis report

Static analysis result for SHA-256 f1589dbf184c5855…

MALICIOUS

PDF

72.2 KB Created: 2021-03-29 01:50:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 16d287d3be5d06280d6336ff2184d56f SHA-1: b2e2f99872f95c4c8642306c87a0eb5527a6afa7 SHA-256: f1589dbf184c5855965196c5c4701c0c9caef3bc629e8a9228378b7024b7d31a
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, a common tactic for phishing or distributing further malware. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically identified as Pdf.Phishing.Trojan. The document body, though heavily obfuscated, appears to be a lure related to a 'thank you mr. falker' message, directing users to external URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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/aws?utm_term=thank+you+mr.+falker
    • http://digitaltoolsfor.xyz/7901653822711ec7.pdf
    • http://getchambre.xyz/kimuviwht2ra.pdf
    • http://dommasters.site/gorizulupolafojere9xq1j.pdf
    • https://setinedib.weebly.com/uploads/1/3/4/6/134684411/d847e28b5ac.pdf
    • http://nuturejedekaw.22web.org/avengers_endgame_full_movie_online_leaked.pdf
    • https://liwevapazu.weebly.com/uploads/1/3/1/0/131071299/4984497.pdf
    • http://tubezadobuzaro.66ghz.com/quien_invento_la_bombilla_electrica.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://237a2310-9536-43ad-add1-fe73b840a51a.filesusr.com/ugd/8b319d_64434a2864444d3c80958e1e787279b2.pdf?index=true
    • https://45f91bdd-2b68-4e60-ae2c-b14373ae5332.filesusr.com/ugd/0d089b_bc3f4e9ab48048edba7b6b864d1090aa.pdf?index=true
    • http://wojibejo.epizy.com/chipettes_happy_birthday_song.pdf
    • https://3d5b2cfc-74f5-4c02-8466-0d369b02955c.filesusr.com/ugd/69b86f_5ac7921353044e42b9c80c6ad88295ba.pdf?index=true
    • https://s3.amazonaws.com/fajujiju/sogivojitigev.pdf
    • https://63150c49-9e7f-4923-bc7a-1e4049050ce6.filesusr.com/ugd/cba449_565a4b908a924c40bc85947c2808ab76.pdf?index=true
    • https://c941d99d-b58b-4215-81ce-525e38db2b81.filesusr.com/ugd/2dc4cf_62cfa7699bbc4c53a367a5e12358294e.pdf?index=true
    • https://bef89f6e-6323-4b84-ad9d-a44490bfcc4f.filesusr.com/ugd/96768c_9cf3e4bc353d48a29582f21d4efa712a.pdf?index=true
    • https://s3.amazonaws.com/wogikokuzotaxa/incident_reporting_system_for_research_reactors.pdf
    • https://920f4c01-5fd6-4c40-8b27-b99972fecb60.filesusr.com/ugd/d63aaf_c533cbe2aab64779aa644959e228db0f.pdf?index=true
    • https://s3.amazonaws.com/zedudo/gejix.pdf
    • http://mugosovexu.epizy.com/large_format_camera_brands.pdf
    • https://s3.amazonaws.com/suzujewa/capelinha_de_melo.pdf
    • https://1b6fbac1-9b66-4609-9151-81f5d4c316f7.filesusr.com/ugd/5e81b9_34349af39fec4064a9d87cb78c46cec4.pdf?index=true
    • https://s3.amazonaws.com/sifawekujiki/custom_stickers_for_whatsapp_android.pdf
    • http://www.readwritethink.org/classroom-resources/lesson-plans/digging-deeper-developing-compreh
    • 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_off0000dd48.bin
74d0f9e072e82643e61f89ca2854dbd4f11cb5c02d9a28b92c6857c54d64d00a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDD48 4976 bytes
font_01_sfnt_off0000ee1d.bin
1261221e21f5608d2d64cb118a0664616a5e3b8b24a4a043af9e0d320b960054		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEE1D 10864 bytes

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