Malicious PDF — malware analysis report

Static analysis result for SHA-256 e74d5c63beebe2f5…

MALICIOUS

PDF

85.4 KB Created: 2021-07-06 00:32:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: fadd44594dd295a9cd7253461e7ed59a SHA-1: 9fced61d5beb68ce8157dcf907451ae4fe1e3d70 SHA-256: e74d5c63beebe2f505916137f4d451dc86cbcff375bc64df760cc0a788f49c07
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The document contains numerous embedded URLs, many pointing to compromised WordPress sites, suggesting it is designed to redirect users to malicious content or phishing pages. The presence of these links indicates an attempt to lure users to external, potentially harmful, resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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 https://wastran.ru/uplcv?utm_term=the+imossible+quiz+answers
    • https://lisacutler.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b8f463bdf36---27437783009.pdf
    • http://builderall.info/userfiles/file/vajese.pdf
    • http://mijneigenlift.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160765f1de053b---zusave.pdf
    • http://www.finanzanlagen-honorarberatung.de/wp-content/plugins/formcraft/file-upload/server/content/files/160e03f1004c6f---vigaro.pdf
    • https://camile.vn/wp-content/plugins/super-forms/uploads/php/files/dekulbaufffbc5digql6av3r24/lujosututeja.pdf
    • http://cn-polylysine.com/d/files/denebuk.pdf
    • https://avis-medical.ma/wp-content/plugins/super-forms/uploads/php/files/7fbb4d14021ad0bbbde59f1488a29140/pesepuputinesorapu.pdf
    • http://box8websites.com/ckfinder/userfiles/files/lepomepigizesimaroroja.pdf
    • https://kar360.com/resimler/files/74913367607.pdf
    • http://anhbanglaw.com/userfiles/file/bipozokiw.pdf
    • https://www.enterpriselighting.com/wp-content/plugins/super-forms/uploads/php/files/5d12dd69077a023bb3646b458f2c1b7c/35473335643.pdf
    • https://muratay.nl/userfiles/file/weroranoxavimadejur.pdf
    • http://suportti.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ea9072af06---82202496287.pdf
    • https://stakeoutllc.com/wp-content/plugins/super-forms/uploads/php/files/0629c2c9447db2e1de03ca4e5373d46c/dawezeduwi.pdf
    • http://scandirent-new.ru/uploads/assets/file/dasadogizijezebobupumam.pdf
    • http://www.expo-hotel.com/english/wp-content/plugins/formcraft/file-upload/server/content/files/16075fba84b17d---kadakifujepuxuxozum.pdf
    • http://markone-tools.com/upload/files/46524798448.pdf
    • http://andlupa.com/userfiles/file/wirusegozijurutekotanadi.pdf
    • https://www.litesourcenc.com/wp-content/plugins/super-forms/uploads/php/files/14a6ac03d265c3ac893f48d30059741d/31498172359.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088f87214d5b---83713975950.pdf
    • https://sitebyside.ru/wp-content/plugins/super-forms/uploads/php/files/09d5f2ff989f594934ab565a1025046f/tagisozerufetalerur.pdf
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/ff723bd158f3337a4dcfce1f9d239c14/25573528036.pdf
    • https://cornerstonelaw.eu/userfiles//file/zuris.pdf
    • https://rebel-guitars.com/wp-content/plugins/super-forms/uploads/php/files/9a5ab436deb1ef0563522e3c5c8183c7/88251172936.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_off0000e99f.bin
ab45f13e138a6561f2bdc91b87eb7fa3af92cc6968bd6583abbf02987601d5d2
pdf-font-stream PDF embedded font (sfnt) at offset 0xE99F 10772 bytes
font_01_sfnt_off00010249.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x10249 16792 bytes
font_02_sfnt_off00011a5b.bin
36228c87cac203eec19206e3986201ccb21122d88124c0ce8e58980344270d4e
pdf-font-stream PDF embedded font (sfnt) at offset 0x11A5B 17640 bytes