Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e18686f5e49c00d…

MALICIOUS

PDF

78.6 KB Created: 2021-09-19 21:44:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 0f44fcded31558aa0ce177a3f18309b5 SHA-1: c9576d4f8be36c1720fd608b9bd3840bd3143789 SHA-256: 1e18686f5e49c00db08871ec3da55db2adae6f7ad934ae18cf5b9624807b5321
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The PDF contains numerous embedded URLs pointing to what appears to be a link farm, a common tactic for phishing or distributing further malware. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' specifically flags this behavior, suggesting the document's primary purpose is to redirect users through a series of potentially malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://rebeccafantarchitetto.it/userfiles/files/612735394.pdf In PDF document text
    • http://htygroup.com/upload/files/42731969243.pdfIn PDF document text
    • http://cozycornerexpress.com/uploads/files/15780851754.pdfIn PDF document text
    • http://p-itos.net/admin/userfile/image/file/31376012223.pdfIn PDF document text
    • http://www.vitrierbxl.be/wp-content/plugins/formcraft/file-upload/server/content/files/1613c1ea68524e---livipijusi.pdfIn PDF document text
    • http://baove24h.org/upload/files/83042629110.pdfIn PDF document text
    • http://brilliantsolarpaneling.com/userfiles/file/pulesafawaxedojugifasej.pdfIn PDF document text
    • https://gaziemirkentkonseyi.com/upload/files/jofemebam.pdfIn PDF document text
    • https://www.davidcosz.de/wp-content/plugins/super-forms/uploads/php/files/u5vg4qqm2729s2ga013g6vsmks/xogejazifimusovuna.pdfIn PDF document text
    • https://travelworld.ro/userfiles/file/52610335871.pdfIn PDF document text
    • http://espokebar.com/uploads/files/54958943513.pdfIn PDF document text
    • http://sprinter-lab.ru/content/File/11302974272.pdfIn PDF document text
    • http://laibros.com/ckeditor/userfiles/files/73402429123.pdfIn PDF document text
    • http://leaguengn.com/userfiles/file///xozix.pdfIn PDF document text
    • http://graylegalservices.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/11020761847.pdfIn PDF document text
    • https://mamadona.ru/ckfinder/userfiles/files/85905551492.pdfIn PDF document text
    • http://zuche0551.com/upload/file/mifis.pdfIn PDF document text
    • http://pro-roubenky.cz/UserFiles/File/paluti.pdfIn PDF document text
    • http://scherzerpc.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/vavalugaduzafewuwokiweki.pdfIn PDF document text
    • http://keemunblacktea.cn/uploads/file/050222126020.pdfIn PDF document text
    • http://daiichilogistics.com/uploads/news_file/dawijuvoninifara.pdfIn PDF document text
    • http://hermandadperdon.es/userfiles/file/63642325053.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=set+view+margin+programmatically+androidPDF 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_off0000ce06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE06 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e618.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE618 17344 bytes
SHA-256: 0dfddb21766379b040f29a94ab05f71058e78c8d7352793509d5cc91592d0d4e
font_02_sfnt_off0001132f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1132F 11028 bytes
SHA-256: 25ff9668419f86811306796b597ac37e6882314002f18bf4edc8cacfeace8f84

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