Malicious PDF — malware analysis report

Static analysis result for SHA-256 001ec0f660b7dbee…

MALICIOUS

PDF

81.4 KB Created: 2021-09-09 16:45:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: ca287525a64e5e987706d001409ffd99 SHA-1: ca3a4b673487d9dd87409552c3910ea5bf02ae58 SHA-256: 001ec0f660b7dbee2829c1facdc8de2e1bfcf75523e850fdb0df485f4404f519
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document was flagged by ML classifiers and ClamAV as malicious, indicating a phishing or trojan threat. The heuristic 'SE_URGENCY_LURE' suggests the document uses time-sensitive language to prompt user interaction. While no scripts were extracted, the presence of numerous external URIs, many hosted on potentially disposable domains, points towards a link farm designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://ikitellirezistans.com/upload/files/sozovenedafib.pdf
    • http://www.sandipmallick.com/fckimages/file/76551965181.pdf
    • https://www.tahitotfalu.hu/ckfinder/userfiles/files/jepilawoluvumavexed.pdf
    • http://gongin.humenia.com/upload/userfiles/2021/09/files/210908185827.pdf
    • https://m-astar.com/UserFiles/files/1747461332.pdf
    • http://congluc.com/upload/files/visevilekowuf.pdf
    • http://pantipplaza.com/userfiles/file/ralezowona.pdf
    • http://lachina.cn/upload/file/43803653228.pdf
    • http://ydyb.com/filespath/files/20210902042131.pdf
    • http://eyela.kr/uploadfile/fckeditor/file/tatesitojuvirageduriza.pdf
    • http://elateridae.com/images/FCKeditor/file/metowikobenixo.pdf
    • http://www.giuseppe.ru/ckfinder/userfiles/files/96062200697.pdf
    • http://maturitni-ples.eu/UserFiles/File/tobavesipuxariwasixi.pdf
    • https://macauroommate.com/ckfinder/userfiles/files/tijinona.pdf
    • http://rem-proekt.com/f/file/latebobanabavaf.pdf
    • http://kovacsoltvaskerites.hu/images/file/vudobepasezavexi.pdf
    • https://techson-cctv.com/upload/file/3825581024.pdf
    • http://inimtrento.it/userfiles/files/selob.pdf
    • https://www.isgs.org/wp-content/plugins/super-forms/uploads/php/files/572cfa708974f4870a7af0874cc5ec90/88232362928.pdf
    • https://nwdglobal.com/ckfinder/userfiles/files/rizidapepu.pdf
    • http://annamsaigonlaw.com/upload/files/kipisosenofolusabipiv.pdf
    • http://union.travel/ckfinder/userfiles/files/54590131933.pdf
    • http://wxeina.com/userfiles/files/62456386438.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=screen+mirroring+for+iphone+to+android+tv
    • 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://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d661.bin
08e51b1948a26cc9aba673628b29f0599edcfb52a74ab3aa4fc7922285f34fab		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD661 18772 bytes
font_01_sfnt_off000106e9.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x106E9 16792 bytes
font_02_sfnt_off00011f00.bin
f29abf0787eb9b1399ae15fea1bab2a235b815ba8b683745e61a0b4cb834e1b9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11F00 10996 bytes

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