Malicious PDF — malware analysis report

Static analysis result for SHA-256 b6e296e04ccbdb3f…

MALICIOUS

PDF

90.3 KB Created: 2021-09-01 08:57:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 8ae174db88c3a00600f4ee28d3aa0ee6 SHA-1: 04f662043d0f949615be23ad7561142f40e1c425 SHA-256: b6e296e04ccbdb3f0fedc8b056571f8b95e6ed096b5be65376fbf3bab38469ab
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a phishing or trojan distribution attempt. It contains numerous links to external websites, many of which are hosted on compromised or disposable domains, suggesting a link farm designed to redirect users to malicious content. The presence of 'cmd' in a URL path further suggests potential command execution or exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9930

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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.
  • 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 http://historia-bfured.hu/userfiles/file/lorozemegiwisix.pdf
    • http://leebyunghun.kr/new/upload/board/files/3158138882.pdf
    • http://mmsmarin.com/imgimage/file/10963260701.pdf
    • https://www.booster-p.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a662d730c60---duwijividebegorosip.pdf
    • https://lllk.ru/wp-content/plugins/super-forms/uploads/php/files/ba11af8b1d7f29f9243424bfba01357f/37049661487.pdf
    • https://revapackers.com/wp-content/plugins/super-forms/uploads/php/files/9h1ef1qhidkcmd44hjegmanveb/80040456414.pdf
    • https://ruxthai-guesthouse-chiangmai.com/ckfinder/userfiles/files/xonuzageruj.pdf
    • http://zovsh.com/Uploadfiles/files/43861862790.pdf
    • http://worksafeorg.com/wp-content/plugins/super-forms/uploads/php/files/l3n3a92opj4pfoo59kds44rkj2/818996536.pdf
    • https://123natura.com/stockages/files/2789691076.pdf
    • http://lasermedia.cn/userfiles/file/46442951677.pdf
    • http://www.onegelha.com/wp-content/plugins/super-forms/uploads/php/files/2b5aba2e461a089a71201cca89f3e950/9426666719.pdf
    • https://www.totspotdaynursery.co.uk/ckfinder/userfiles/files/81015010507.pdf
    • https://drivingschoolofnorthtexas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a856190fe01---vulanekikukugifakebibef.pdf
    • https://autotronics.vn/userfiles/file/dazewijodipokaz.pdf
    • http://signauction.net/userfiles/file/zotesoniziwogisikugene.pdf
    • http://principessavencanice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8ec9f11ec6---71350323591.pdf
    • https://hyosungulf.com/uploads/file/sulovofe.pdf
    • http://svenskafik.se/uploads/fckeditor/file/fadomi.pdf
    • https://www.mii.net/wp-content/plugins/super-forms/uploads/php/files/5e839829e2dee701b078283ac6aeb8d7/bisazemafam.pdf
    • http://xn--h1acbpobggs.xn--p1ai/data/files/mebekiwoxumaxugofego.pdf
    • http://farmaciafasolis.eu/userfiles/files/naxubikaburusoduw.pdf
    • http://www.egavilanes.com/ckfinder/userfiles/files/36864445385.pdf
    • https://ruxthai-guesthouse-c
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=checker+rules+king+moves
    • http://s292376414.onlinehome.fr/datas/imgmail/file/8327586892.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://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f120.bin
e202c1ec61ffb439c33dd17f80d23c5116930f5a1b5087bd0036a2d9413cdabf		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF120 2140 bytes
font_01_sfnt_off0000faca.bin
df2b0c07eb3e1d76dfa5b069bb3a2b358d06c16d660fe63231cff89b849d7923		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFACA 10704 bytes
font_02_sfnt_off0001132c.bin
69fadbe1b7266ebc51b5b1a9842c696f6d6909d01d7773b09fa876f5d62222b3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1132C 18408 bytes
font_03_sfnt_off000142f0.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x142F0 16792 bytes

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