Malicious PDF — malware analysis report

Static analysis result for SHA-256 4630afe6e2c48389…

MALICIOUS

PDF

81.9 KB Created: 2021-09-12 18:22:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 98f7da471154243c36402f763314cd17 SHA-1: 6e315d3fccd96e009646420ca3fff8c23ffef467 SHA-256: 4630afe6e2c483894e718d9fc6b33423e5b48ff7a3734d4c36be462763f3ceea
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF was flagged by ClamAV as 'Pdf.Phishing.Trojan' and ML classifiers indicated a high probability of maliciousness. The document contains a link farm pointing to compromised WordPress sites, with one URL specifically mentioning 'avaya one x download windows 7', suggesting a lure for software downloads. While no scripts were directly extracted, the nature of the link farm and the detection names strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://neoville.ru/wp-content/plugins/super-forms/uploads/php/files/a28e9fe07c43b4b70d4b8d655fdfc71f/nalumadewumuxivetozozule.pdf
    • http://mawratanews.com/armedia/uploads/files/beseloxi.pdf
    • http://www.primalegal.eu/wp-content/plugins/super-forms/uploads/php/files/fttdg6a3ca5ek67d6d2qtpra37/69542918403.pdf
    • http://n2nnetworks.com/files/others/78544750865.pdf
    • http://fulepmark.hu/nyebu/fulepmark/userfiles/file/74117889777.pdf
    • https://adasms.fr/userfiles/file/74528704253.pdf
    • http://timeyear-v.com/userfiles/file/27828020849.pdf
    • https://mayphotocopydogia.com/upload/files/jexiwizaneja.pdf
    • http://rialta.ie/userfiles/files/kudekukuzoligina.pdf
    • https://iphonerepairservice.nl/app/webroot/files/userfiles/files/2725343981.pdf
    • https://cengilli.com/icerik_images/file/begesipagawaroloviw.pdf
    • https://diedacorporation.net/freesiafiles/file/34075422282.pdf
    • https://vasantviharproperties.com/userfiles/file/65610930544.pdf
    • http://hujiangsy.com/upload/files/38817375550.pdf
    • https://beautifullifeuk.com/wp-content/plugins/super-forms/uploads/php/files/784c88729fd5d92f42bab130a858d382/6966839957.pdf
    • http://gutachterbewertung.de/userfiles/file/69249076951.pdf
    • http://mdbim.pl/ubezpiecz/obrazy/file/9655709740.pdf
    • http://lex.tj/img/file/58391414663.pdf
    • https://tl-systems.hu/files/files/nowat.pdf
    • http://hepiran.com/cache/fck_files/file/62242542759.pdf
    • https://limblength-sldf.com/userfiles/file/48371689330.pdf
    • http://nhakhoauytinhaiphong.com/upload/files/3221944142.pdf
    • https://led7.ru/file/viletizoka.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=avaya+one+x+download+windows+7
    • 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_off0000deca.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xDECA 16792 bytes
font_01_sfnt_off0000f6e1.bin
6dcefaeb0b1c49ba61fd76506b827e2d7c20612f9fc3da88d5d3e4e388155891
pdf-font-stream PDF embedded font (sfnt) at offset 0xF6E1 10444 bytes
font_02_sfnt_off00010ed3.bin
e8362d1f7f7b46c0aff448933106a86cb4aa4fcad038f8b7ed6bcfd2bde9ee55
pdf-font-stream PDF embedded font (sfnt) at offset 0x10ED3 16672 bytes