Malicious PDF — malware analysis report

Static analysis result for SHA-256 60fbcaedf77fd717…

MALICIOUS

PDF

73.3 KB Created: 2021-09-27 01:12:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 1b0bb115847250d7c2d19f32f1b47726 SHA-1: 846c551d1b213b60b744d74fad9f262d446f7a6a SHA-256: 60fbcaedf77fd7175428fec8d383eabd9a0c3839c5589abb12339d17f11c75ab
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised WordPress sites, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution. The presence of external URIs and link farm heuristics supports the attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.almansori-ye.com/almansorifiles/files/gixakawexipupupi.pdf In PDF document text
    • https://designclarf.it/file/67382922657.pdfIn PDF document text
    • https://bedandbreakfastholten.nl/userfiles/file/welixuwojotigikajise.pdfIn PDF document text
    • http://irvine.songhakbbq.com/uploads/files/9045315772.pdfIn PDF document text
    • http://ayurveda-shiatsu-nice.com/upload/files/zexofezavoxidorenasidaf.pdfIn PDF document text
    • http://kfbma.org/files/fck/file/89848863412.pdfIn PDF document text
    • https://www.wroclawmodelshow.pl/ckfinder/userfiles/files/xerarujajadijevafig.pdfIn PDF document text
    • http://bergfin.se/wp-content/plugins/formcraft/file-upload/server/content/files/1613566a79994b---rawapofuvugeme.pdfIn PDF document text
    • http://www.huntsvillepr.com/files/files/76449294225.pdfIn PDF document text
    • http://dragonera.cn/admin/userfiles/file/divevexewibuv.pdfIn PDF document text
    • http://kristiankutschera.de/userfiles/file/43786721170.pdfIn PDF document text
    • https://artcorner-fiberglass.com/userfiles/files/duzapenubowejo.pdfIn PDF document text
    • http://abnicum.ru/files/file/wanutizewelozuvutatifi.pdfIn PDF document text
    • http://photonart.nl/phpcmsys/file/tenufawuxegezimetajeb.pdfIn PDF document text
    • http://www.c-l-r-p.com/admin/ckfinder/userfiles/files/86081864463.pdfIn PDF document text
    • https://selectwifi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613a3097adebb---71637379281.pdfIn PDF document text
    • https://arslanemlak.com/E/file/In PDF document text
    • http://bangiyaparishadtoronto.ca/bpt/editor/uploadfiles/87555955028.pdfIn PDF document text
    • http://steinbach.casawell.tw/userfiles/file/79346761154.pdfIn PDF document text
    • http://zavalinka.by/var/upload/file/foduguwilumis.pdfIn PDF document text
    • https://admonks.ru/wp-content/plugins/super-forms/uploads/php/files/51685da41c854eed510431cc16580aa3/19148140603.pdfIn PDF document text
    • https://eetravel.net/file/81439232169.pdfIn PDF document text
    • http://king-pro.com/userfiles/files/76513772804.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=counter+strike+1.6+cheat+enginePDF 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_off0000b3ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB3EC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000cc03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC03 10972 bytes
SHA-256: 7c68b48446041ef8d1caaf9d49e801c1177894aaafc3e08aa630fd791dad5e8d
font_02_sfnt_off0000e592.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE592 19392 bytes
SHA-256: 0e9af27fda939e9e00a0f248591e48a193262402d5ee613a651ea9cbb50406fe