Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f606e10e15ab634…

MALICIOUS

PDF

82.2 KB Created: 2021-07-16 21:30:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: dcb1bb2abebd955132429124821cacf5 SHA-1: d117bda8b05013a1fbd3262854331f47a2cdfe58 SHA-256: 2f606e10e15ab634c78ddeaceca3034b78b4ebf8295b4d7b851de56c662e76e0
156 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains numerous links, many pointing to compromised WordPress uploads or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of multiple external URIs and link farm indicators strongly suggests a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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://seedomoretravel.com/files/files/5010099044.pdf In PDF document text
    • https://chetanaus.org/bheru/uploadfiles/file/69718693545.pdfIn PDF document text
    • http://allg-gyn.ch/userfiles/file/zafijoditozel.pdfIn PDF document text
    • https://behagi.eus/files/galeria/files/rakixamuxabubevik.pdfIn PDF document text
    • http://studiolegalezullo.eu/userfiles/files/goxivosofuwelawemojobilu.pdfIn PDF document text
    • https://jclifeschools.org/wp-content/plugins/super-forms/uploads/php/files/7657cc342170570ab3e9f91b5b5b42cb/11111130159.pdfIn PDF document text
    • http://emke.hu/uploads/ckfinder/userfiles/files/xemanonelidepogotomosimex.pdfIn PDF document text
    • http://johndanton.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/43221158220.pdfIn PDF document text
    • http://fairway.cc/images/blog//file/dubosenepofurujofa.pdfIn PDF document text
    • http://mikailang.net/userfiles/file/20210518212951_1011933398.pdfIn PDF document text
    • http://stylowa-pss.pl/userfiles/file/89359256912.pdfIn PDF document text
    • http://lacasedescaraibes.fr/file/wopijipikotizawosi.pdfIn PDF document text
    • http://midiabyz.com/wp-content/plugins/super-forms/uploads/php/files/d988486a6a30063ecda79dd904108b5b/35870277316.pdfIn PDF document text
    • https://avayemehr-carpet.ir/data/file/75719817293.pdfIn PDF document text
    • http://wib24-admin.de/uploads/file/zaguduxofikupeb.pdfIn PDF document text
    • https://hmv.ir/wp-content/plugins/formcraft/file-upload/server/content/files/16073a0c5351dc---xibedogose.pdfIn PDF document text
    • https://afriqueitnews.com/wp-content/plugins/super-forms/uploads/php/files/9d2f4b3713afef2fae0a779e7d687250/xisanume.pdfIn PDF document text
    • https://planet-for-events.de/userfiles/file/xufalekunera.pdfIn PDF document text
    • https://dungcuruamui.com/wp-content/plugins/super-forms/uploads/php/files/cd6jpji86pn8chg67cnfllf7h4/tibupigimageromodevom.pdfIn PDF document text
    • http://originalcheck.it/public/img_admin/file///77197993534.pdfIn PDF document text
    • http://ventilyatsia-v-sochi.ru/ckfinder/userfiles/files/15968466410.pdfIn PDF document text
    • https://beribuket.ru/wp-content/plugins/super-forms/uploads/php/files/0d73f3939cdcf4026ebf52f6e5895b8c/60517950935.pdfIn PDF document text
    • http://juniorsmagazine.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083b4d4cdfa7---fezewunodonawob.pdfIn PDF document text
    • http://ackerviewguesthouse.com/userfiles/file/bomuwu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=ope+there+goes+gravityPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dc1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC1B 17512 bytes
SHA-256: cb6b826eb453c1336335cc74e3b9ba79d39a3a581c98ec08dfa940fe9ce1616d
font_01_sfnt_off000109a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109A3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000121ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121BA 10584 bytes
SHA-256: 6387890ccb04472777f7d2dca2777f0bc165bdce9231688642bb51d2c0dd23fc

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