Malicious PDF — malware analysis report

Static analysis result for SHA-256 96e227424d278d6d…

MALICIOUS

PDF

78.8 KB Created: 2021-06-28 14:48:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 75cd870deb77d3e304d195b6a7ac7b19 SHA-1: e882176482a426bed2619db32172d0711221133a SHA-256: 96e227424d278d6d7369321fcbf111e5f920fa5edf544305b4fc5cb4a5ddf2b9
156 Risk Score

Malware Insights

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

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains a link farm pointing to multiple domains, many of which are hosted on compromised WordPress sites or disposable hosting, suggesting an attempt to distribute malicious content or phish users. The presence of embedded URLs and the PDF_SEO_DISPOSABLE_LINK_FARM heuristic indicate a deliberate effort to create a deceptive link structure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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
  • 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://www.aportecnica.com/imagenes/editor/file/96596105670.pdf
    • http://tksvolga.ru/userfiles/file/fabet.pdf
    • http://neuragen.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160a5fb96e12c0---nejivatuda.pdf
    • http://shtaket46.ru/page_edit/_samples/userfiles/files/32583027678.pdf
    • http://thegioidahoacuong.com/uploads/image/files/44587661022.pdf
    • http://firmykominkowe.pl/Obrazki/edytor/file/nepudezekifa.pdf
    • http://maroba-zirndorf.de/file/jixapebiputunogoti.pdf
    • http://lucann.com/Upload/file/51925929236.pdf
    • https://expeditions-travel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606e6f7b9670b---kofafifajilawuxifu.pdf
    • https://cissud.eu/uploads/ck_editor/files/bozafus.pdf
    • https://webgirls-studio.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093902cbf155---doferukubilofesutasisena.pdf
    • http://gleneaglehoa.org/images/file/33556375955.pdf
    • https://ancoraeducacion.com/images/983529888.pdf
    • http://klpa.net/userData/board/file/mawitotisulaf.pdf
    • http://www.sensible-seeds-premium.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c0c9543209a---91195860354.pdf
    • http://kingspec.su/wp-content/plugins/super-forms/uploads/php/files/ifi8pplt1tfcs1c86jr7hhi85g/dijidujuno.pdf
    • https://alignerco.com/wp-content/plugins/super-forms/uploads/php/files/6c898ecfb3dcbfaa088646a2f435244b/tanaxuxiwegipu.pdf
    • http://www.insurancedirectcanada.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160a0a610ed634---23668293323.pdf
    • https://serwisnawigacji.pl/userfiles/file/57055439018.pdf
    • https://broadstripe.com/wp-content/plugins/super-forms/uploads/php/files/45c1afbfb6c3627a6a29e0e68fa35313/12823530531.pdf
    • https://wholisticvibrations.com/wp-content/plugins/super-forms/uploads/php/files/1c48c4790cb3d28c6df116df00f541c5/sepepepepuxebaruduwoni.pdf
    • https://www.higher-energy-trampolineclub.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080a14098495---39904733890.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=time+to+say+goodbye+piano+sheet
    • 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_off0000d218.bin
64737620d4b1592c734969abce5805c767d6934ed947ce594b10dc1d6afa3b25
pdf-font-stream PDF embedded font (sfnt) at offset 0xD218 10908 bytes
font_01_sfnt_off0000eac1.bin
cb6d478a846561328163463b89f3e9f9ea2a9de4dda23466cd05d055d9c64c76
pdf-font-stream PDF embedded font (sfnt) at offset 0xEAC1 16628 bytes
font_02_sfnt_off00011629.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x11629 16792 bytes