Malicious PDF — malware analysis report

Static analysis result for SHA-256 49bbc02a951c9bc7…

MALICIOUS

PDF

83.3 KB Created: 2021-09-03 19:42:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 8d3277acedc8d09fae79dc1c90bc7ec5 SHA-1: a49990ace577eb2387e2827085efa804276459b2 SHA-256: 49bbc02a951c9bc7e861c6fa3bc678b0608a274fb174b4cd7024110e2ac923ab
156 Risk Score

Malware Insights

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

The PDF file contains a link farm with numerous URLs pointing to various domains, many of which are hosted on compromised CMS uploads or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The presence of multiple external URIs and link farm characteristics suggests an attempt to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9911

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://shopabrang.com/images/files/gokefaparonefanizomib.pdf
    • http://irinaburmistrova.ru/files/xatenazefo.pdf
    • http://zekidilektekstil.com/images_upload/files/36858494724.pdf
    • https://prokoncept.hu/admin/blogfck/image/file/wosatowaxavinemok.pdf
    • http://castrolmintabolt.hu/images/upload/file/66849008043.pdf
    • https://slide-bearing.com/d/files/refitirobaniduzojawis.pdf
    • http://turatabor.hu/media/45513255971.pdf
    • https://charterboatdeliverance.com/uploads/files/93368135075.pdf
    • https://atlanthealth.com/wp-content/plugins/super-forms/uploads/php/files/5ec353c712073928c6d9f870dbe45994/3893328713.pdf
    • http://mygiftltd.com/userfiles/file/devijadimebagugavikeretaf.pdf
    • https://nailseasupportgroup.com/wp-content/plugins/super-forms/uploads/php/files/7d879faa042ae43429dadba43808796f/22350254053.pdf
    • http://www.lugashotel.com/data/editorfile/93540137166.pdf
    • http://mmt24.ru/files/file/54289539829.pdf
    • http://goldnumber.info/userfiles/file/lalusopalaxonalagisoda.pdf
    • https://delcinfo.ru/img/files/files/debax.pdf
    • http://seoulsquare.com/userfiles/file/nufedisabuvusijaxik.pdf
    • https://suksesunited.com/contents//files/fipukobedixegaluduveje.pdf
    • http://abwlondonblvd.com/uploads/files/najasopedugikejewotil.pdf
    • http://riversedgefm.com/files/file/nurinugozezotewipegewe.pdf
    • https://mimpiindah168.com/contents//files/2654100316.pdf
    • http://furkansigorta.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160aaebfed75c8---37369923036.pdf
    • https://zionapostolicministries.org/uploads/file/gafadufasonorol.pdf
    • https://www.americanapi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c45df5a6c2a---kimotixadafuvepiwafepid.pdf
    • https://mps-india.com/userfiles/files/61203129855.pdf
    • http://soflacops.com/clients/83266/File/sidoxepelu.pdf
    • http://pusancard.com/userData/board/file/kosobadidopuwulaxa.pdf
    • http://bfr-bialapodlaska.pl/userfiles/file/33551019412.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=pulsar+digisight+lrf+n870+manual
    • 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_off0000dfae.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xDFAE 16792 bytes
font_01_sfnt_off0000f7c0.bin
a13bf9da607209c95d24959005325c17a4f358707ba9549fde63b628a5479929
pdf-font-stream PDF embedded font (sfnt) at offset 0xF7C0 17748 bytes
font_02_sfnt_off00012626.bin
fa9bae5d1453b0766806afd9bd2bc2b4ff01be9adff99ae69131fd1134abeaa6
pdf-font-stream PDF embedded font (sfnt) at offset 0x12626 11028 bytes