Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d8a665ea44916c0…

MALICIOUS

PDF

80.8 KB Created: 2021-09-08 19:59:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: c336382a319277914e2598504c97b367 SHA-1: 1f7af49edd86c57e0d223a26ff3dac0148abc31c SHA-256: 6d8a665ea44916c0ab51502eea2ab3674e960a30cd1d5550c1eac868a580e631
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It functions as a link farm, presenting numerous URLs that lead to external resources, some hosted on compromised CMS uploads or disposable domains. The presence of 'utm_term' parameters suggests an attempt to track user engagement, common in phishing or spam campaigns. While no scripts were explicitly extracted, the PDF structure and URL patterns are indicative of a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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
  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://smidgel.ru/uplcv?utm_term=mirror+therapy+for+phantom+limb+pain+pdf PDF link annotation
    • https://onlineadda.net/ckfinder/userfiles/files/depejilabatu.pdfIn PDF document text
    • https://stw-nowogard.pl/download/file/33533821023.pdfIn PDF document text
    • http://kelvista.lt/images/files/27935642888.pdfIn PDF document text
    • http://pnlestari.com/visitbali/image/files/50727496087.pdfIn PDF document text
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/1613052087f9ac---99110802699.pdfIn PDF document text
    • http://biancoacolori.it/userfiles/files/85897224373.pdfIn PDF document text
    • http://studiochiodo.eu/userfiles/files/31391077457.pdfIn PDF document text
    • http://xn--o79av69abka850ab6c.com/upload/file/202109060703185045.pdfIn PDF document text
    • https://www.hadlowsecurityshutters.com/wp-content/plugins/super-forms/uploads/php/files/2835d1183a717ff5b41333a4149100f5/maxitaluwadux.pdfIn PDF document text
    • http://bookblog.kr/data/file/files/35708934808.pdfIn PDF document text
    • https://expomediainc.com/upload/file/mivekunem.pdfIn PDF document text
    • https://www.allterra.group/wp-content/plugins/super-forms/uploads/php/files/92fe0aed27d6cf5762d3ce756d023bc4/53301222057.pdfIn PDF document text
    • http://24x7taazasamachar.com/assets/ckfinder/core/connector/php/uploads/files/xumagodapuzelanu.pdfIn PDF document text
    • http://libertyquad72.fr/userfiles/file/74274026351.pdfIn PDF document text
    • https://aguiapromocional.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1613032b8d034b---nesinoxevezewe.pdfIn PDF document text
    • https://www.shopveriamici.com/wp-content/plugins/super-forms/uploads/php/files/grd0pdpl2cmauhpfs019v1ppnh/79298293248.pdfIn PDF document text
    • https://choiceenergynetwork.com/wp-content/plugins/super-forms/uploads/php/files/e6ef1e247e3bd2a2eb189053dfdf637f/72098305613.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/161388e4eedb12---53315199860.pdfIn PDF document text
    • https://winpoasia.com/ckfinder/userfiles/files/96144941331.pdfIn PDF document text
    • http://theponghop.com/upload/files/wepesipomizowiwepivo.pdfIn PDF document text
    • https://redac.ch/upload/79247670090.pdfIn PDF document text
    • http://luisacortesearchitetto.it/userfiles/files/6326764650.pdfIn PDF document text
    • http://wadsoda.com/UserFiles/File/867466111.pdfIn PDF document text
    • http://evo-models.com/uploads/userfiles/files/67379197689.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_off0000dbea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBEA 15864 bytes
SHA-256: 0a0a0548b2737282c43c4778255d0ca1f128ff02e5d1c2e71aafe1c3ab7f757e
font_01_sfnt_off000104a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104A5 10844 bytes
SHA-256: 2a12fc21b724e2dff9a0caf9ecdabb94010201bea4dfe996d692a072f3953c42
font_02_sfnt_off00011d3f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D3F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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