Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd2ec871a9a8747b…

MALICIOUS

PDF

68.0 KB Created: 2021-09-27 22:22:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: bdd2dc48fa8d309f7e8556787058a0b1 SHA-1: 41202df391681c73cda15746baee23e23963c0c9 SHA-256: cd2ec871a9a8747b1368c5f632838ec1fd42bc869c0c579cb79d3a754ea9e5de
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF employs an image-only lure, a common tactic for phishing, and contains numerous links pointing to compromised websites and disposable hosting. The presence of external URIs and a link farm structure strongly suggests an intent to redirect users to malicious content. ClamAV detection and ML classification further support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9972

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 67 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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://crewmak.ru/uplcv?utm_term=how+to+hack+play+store+password PDF link annotation
    • http://guides2alpes.org/uploads/file/18258860630.pdfIn PDF document text
    • https://volpatoebrum.com.br/_common/admin/scripts/ckfinder/userfiles/files/24633219808.pdfIn PDF document text
    • http://www.forteks.com.br/admin/ckeditor/ckfinder/userfiles/Images/99396053786.pdfIn PDF document text
    • http://lempreintedubois.fr/userfiles/lempreintedubois.fr/file/74552109937.pdfIn PDF document text
    • http://wwpokebar.com/uploads/files/dujukugerupabo.pdfIn PDF document text
    • http://bangdientunhk.com/upload/files/xegowakusu.pdfIn PDF document text
    • https://doanhnghiepvietnam.org/img_duhoc/files/nimonaba.pdfIn PDF document text
    • http://bankerz.in/qpic/files/ririmagikeluliparemiwu.pdfIn PDF document text
    • https://ever-progress.com/upload/files/65606183120.pdfIn PDF document text
    • http://abnicum.com/files/file/dumut.pdfIn PDF document text
    • https://www.tonygssoulfood.com/wp-content/plugins/super-forms/uploads/php/files/3eee662f7427cb05d40c946807732ab6/vamuvisizinetozob.pdfIn PDF document text
    • http://heorungminhphat.com/luutru/files/83276607533.pdfIn PDF document text
    • http://etabetasurvey.com/userfiles/files/42266160797.pdfIn PDF document text
    • http://jamxmpharmatech.com/upload/files/49396582088.pdfIn PDF document text
    • http://salonorganica.ru/upload/files/wazuzugilixadisuvejiz.pdfIn PDF document text
    • http://allegroescrow.com/wp-content/plugins/formcraft/file-upload/server/content/files/16141041e7929f---kidub.pdfIn PDF document text
    • http://xn--42-6kcdlkbomh7beggito5p.xn--p1ai/userfiles/file/29386724421.pdfIn PDF document text
    • https://salwangurugram.com/files/razixu.pdfIn PDF document text
    • http://huyndaicaudien.com/upload/files/jazagafugixo.pdfIn PDF document text
    • http://aesg2edcv.handylover.com/upload/files/44303771605.pdfIn PDF document text
    • http://bighost.vn/uploads/userfiles/file/ramijokojegumax.pdfIn PDF document text
    • http://koovappadyscb.com/ckfinder/userfiles/files/bofimujapijol.pdfIn PDF document text
    • http://jeugdopdewetenschapsagenda.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1614f29cda8246---83752663008.pdfIn PDF document text
    • 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_off0000acf8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xACF8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c50f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC50F 10696 bytes
SHA-256: 4ce111785f26ee4f02b01df0485008a742c3c2c7b333035c0b33a4e9192633ec
font_02_sfnt_off0000dddf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDDF 14032 bytes
SHA-256: 022ce4b932edd45d6fe4a794ff6ef5a5fdc123ea5c1f381d62ffdfa2ce67107a

Open this report in the interactive analyzer, or submit your own file for analysis.