Malicious PDF — malware analysis report

Static analysis result for SHA-256 234afa289a944ae3…

MALICIOUS

PDF

79.5 KB Created: 2021-09-13 16:14:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: a0db5bbc731aef24a95ac1a7839f3f41 SHA-1: 2a4239ba88fb9d49c73ef056f5b098239e6d98ca SHA-256: 234afa289a944ae3d18665bdb02f553b6b4cace9b3be0f8bc8eceaca49f6bfc8
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was flagged by ML classifiers and ClamAV as malicious, with multiple heuristics indicating it is a link farm on disposable hosting. The PDF contains numerous external URIs pointing to various domains, including one that uses a raw IP address, suggesting a phishing or malware distribution attempt. No scripts were extracted, but the overall structure and heuristic firings strongly indicate a malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9846

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
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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 https://garglob.ru/uplcv?utm_term=android+development+companies+in+mumbai
    • https://servauto.fr/img/user/file/zinesekemileza.pdf
    • https://lazeo.nl/userfiles/file/57674599880.pdf
    • http://www.kevimotor-rock.hu/files/files/83393264637.pdf
    • https://servingltda.com/userfiles/file/31094957299.pdf
    • http://104.156.58.56/~web2inbox/wp-content/plugins/formcraft/file-upload/server/content/files/1612eacc9cfa65---74151756608.pdf
    • https://travelinnsuites.com/nbloom/fckuploads/file/kesasupid.pdf
    • http://boldogelet.hu/media/pofidobimuwesemox.pdf
    • https://martensmgt.com/business_school/uploads/file/foxofadi.pdf
    • https://gdaniec.com/upload/files/69994803747.pdf
    • https://rowadalbyt.com/userfiles/files/589312597.pdf
    • https://norservis.com/files/files/duromedovutotosowabal.pdf
    • http://parfumerieindex.nl/images/uploads/4705074116.pdf
    • http://shacklefordlawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/65242590462.pdf
    • http://cck-brno.cz/ckfinder/userfiles/files/lofixisop.pdf
    • http://ouhkpthaa.org/userfiles/xewabutasu.pdf
    • http://balade-pierry.fr/userfiles/file/bogolekaruwim.pdf
    • http://www.otevrenysklep.cz/ckfinder/userfiles/files/ropemilafupaja.pdf
    • https://magnettoptan.com/upload/ckfinder/files/vobolupo.pdf
    • http://e-pisanie-prac.pl/famprojekt_z_serwera/images/file/66661928415.pdf
    • http://duszek-lasu.pl/userfiles/file/27136233956.pdf
    • http://cachnhietwin.com/luutru/files/61771656575.pdf
    • http://indiebookoftheday.com/wp-content/plugins/formcraft/file-upload/server/content/files/161351c9eb2313---tonakalixigugokakonajer.pdf
    • http://dispensapertutti.com/userfiles/files/17367980236.pdf
    • http://zhongguohuachun.com/d/files/kegipi.pdf
    • https://www.blondel-bois.fr/ckfinder/userfiles/files/vurosiwivorodufi.pdf
    • http://itcck.org/upload/editor/file/57709871200.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d08d.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD08D 16792 bytes
font_01_sfnt_off0000e89f.bin
847c641b8316df58658ea78ee01938449466a6fc9e9bb800745b74158b5a3fa1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE89F 17892 bytes
font_02_sfnt_off00011708.bin
1b741610291b8b37edaffccfa62fc63980454e34900955e0ec41e9b647beb130		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11708 10960 bytes

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