Malicious PDF — malware analysis report

Static analysis result for SHA-256 f7ccd2124b7430ea…

MALICIOUS

PDF

83.5 KB Created: 2021-09-18 17:25:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 985b3b73035eebef2a17f339cf04ef0f SHA-1: d5af5d7e5ae288603458566a2216f4635749e323 SHA-256: f7ccd2124b7430ea25bb13850cb874baae5500b11578da8c48e9bf1e1ac7b9c7
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious File

This PDF document contains numerous links to external websites, many of which appear to be compromised WordPress upload directories or disposable hosting. The 'SE_ENABLE_LURE' heuristic indicates the document likely instructs the user to enable macros or editing, a common tactic for malware droppers. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to download and execute a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • Macro/content-enable lure medium SE_ENABLE_LURE
    Document instructs the user to enable macros or editing — a common technique used by malware droppers to bypass Office macro security settings
  • 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://pixomot.ru/uplcv?utm_term=comment+transferer+les+contact+android+vers+iphone PDF link annotation
    • http://dlshixiang.com.cn/ckfinder/userfiles/files/goruk.pdfIn PDF document text
    • http://bjbtrh.com/files/pic/file/73958215260.pdfIn PDF document text
    • https://darkoyunpin.com/calisma2/files/uploads/zunesazuxibesolokodowi.pdfIn PDF document text
    • http://aptwash.com/userData/ebizro_board/file/33391773427.pdfIn PDF document text
    • http://goksirlambinowice.pl/img/upload/files/19159680092.pdfIn PDF document text
    • http://2015.letnifestiwal.pl/ckfinder/userfiles/files/lavuso.pdfIn PDF document text
    • http://ysmenmidwestindia.org/uploads/userfiles/file/file/74519619002.pdfIn PDF document text
    • http://wx-test.com/upload/ckimg/files/202109032128312497.pdfIn PDF document text
    • https://lakecountyoralsurgery.com/wp-content/plugins/formcraft/file-upload/server/content/files/161369ec8e7862---vaxipebebu.pdfIn PDF document text
    • https://parvazyab.com/basefile/api203/files/zulikatidubizopubagupame.pdfIn PDF document text
    • http://coutleelaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/gujufojomor.pdfIn PDF document text
    • https://aecvfcom.nrgence.com/upload/userfiles/files/kuwavalabogekexagavutane.pdfIn PDF document text
    • http://terrietanaka.com/library/files/15185691506.pdfIn PDF document text
    • http://russkiivopros.com/images/FCKeditor/file/daxagig.pdfIn PDF document text
    • https://processwork.archerhuang.com/ConImg/files/62301360596.pdfIn PDF document text
    • https://zhavezbozi.cz/data/file/najitilinu.pdfIn PDF document text
    • https://pabausa.org/wp-content/plugins/formcraft/file-upload/server/content/files/1613954fe2768b---lemerisezalefo.pdfIn PDF document text
    • http://spakimthi.com/upload/files/fonudu.pdfIn PDF document text
    • http://geometramaurotozzi.it/userfiles/files/15885156615.pdfIn PDF document text
    • http://www.mostenpo.jp/userfiles/files/xaperisus.pdfIn PDF document text
    • http://www.holzbau-hoelzl.at/wp-content/plugins/formcraft/file-upload/server/content/files/16135267119035---kuxetexefivegison.pdfIn PDF document text
    • http://www.fsnn.se/wp-content/plugins/formcraft/file-upload/server/content/files/16144d27a5e1dc---81595821468.pdfIn PDF document text
    • https://xn--80aaijz0c.xn--p1ai/ckfinder/userfiles/files/penadepagukugosowoxovo.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dd45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD45 10980 bytes
SHA-256: fba53d208780e87b081116d258c7c6f16511d37799bade298584c17b575d62c6
font_01_sfnt_off0000f69b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF69B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010ead.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EAD 20060 bytes
SHA-256: 329710284308f1eebd125e06986ccfd3f16304107bb85ed1a4bf24ea93fda41e

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