Malicious PDF — malware analysis report

Static analysis result for SHA-256 8d06aca6896be40d…

MALICIOUS

PDF

87.6 KB Created: 2021-07-01 15:51:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 052f76bfc0006e2287952c2fa9764596 SHA-1: 2800ffc17199d4417cf2f4fede7dec5ea5ce0bd4 SHA-256: 8d06aca6896be40df12dc9ef9809a43a549cb31e1a7bd4110b13a2d75f51e846
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a link farm pointing to numerous URLs, many hosted on compromised WordPress sites and disposable domains, indicating a phishing or malware distribution attempt. ClamAV and ML classifiers strongly indicate maliciousness, and the structure suggests it's designed to lure users to external malicious content. No scripts were extracted, but the embedded URLs are the primary threat.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9972

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://naseeha.org/wp-content/plugins/super-forms/uploads/php/files/c5425d8c7804792e6dd4d3e95aecc814/42502589170.pdf
    • http://dianacb.cz/userfiles/file/78289963987.pdf
    • http://valeneighbors.com/userimages/vinubutureteziguzixadifuz.pdf
    • http://www.fotografoeventimilano.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b42a4d1cf9---bekikolarosafukel.pdf
    • http://3colorjazz.com/fckeditor/userfiles/image/zopivedetivaru.pdf
    • https://earthchartercities.org/wp-content/plugins/formcraft/file-upload/server/content/files/1606d39e6ee82f---pabazuzanafemipulup.pdf
    • http://abacusnancy.com/userfiles/file/nidunekob.pdf
    • https://fastcomputer.vn/wp-content/plugins/super-forms/uploads/php/files/308c4c461dfcef25c1853f1575f8f74a/xelibi.pdf
    • http://ilturismoinitalia.it/userfiles/files/toridakirogufi.pdf
    • https://uaqbakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b3c3c15093---xivefokirakoj.pdf
    • http://cheumst.com/upload/fckeditor/file/62568946573.pdf
    • http://strategie-online.net/catalogue_dynamique/file/14148579393.pdf
    • http://mdbim.pl/ubezpiecz/obrazy/file/duparuva.pdf
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/1609ef15919d14---tilubibovaj.pdf
    • http://traditionsradio.com/wp-content/plugins/super-forms/uploads/php/files/gltd2hma0nb25a9votoodf11k2/67814793364.pdf
    • http://bascobrunswick.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160b7323799b12---65635038735.pdf
    • http://madang.eu/f_pds/fck/file/87363489051.pdf
    • https://www.ptlittleflower.org/wp-content/plugins/super-forms/uploads/php/files/nklia8usv3e9bmhfgo6d1f5r3g/pezusalebuwibigasubaf.pdf
    • https://www.superioreagle.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072f933785bb---garalesik.pdf
    • http://taxicityplus.ru/userfiles/file/87984745169.pdf
    • http://www.sensible-seeds-premium.com/wp-content/plugins/formcraft/file-upload/server/content/files/160944dca05593---nifikego.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=simple+present+exercises+questions
    • 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_off0000f267.bin
b8f15ef213ddf739ccf17585b151b2a69425bff7758113e530e23edbdeb09fdc
pdf-font-stream PDF embedded font (sfnt) at offset 0xF267 10796 bytes
font_01_sfnt_off00010b35.bin
c8d473cdb14c3a384736f63020ce7496f7b39bdb95d0e9576b405ff3a812311a
pdf-font-stream PDF embedded font (sfnt) at offset 0x10B35 17188 bytes
font_02_sfnt_off000137da.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x137DA 16792 bytes