Malicious PDF — malware analysis report

Static analysis result for SHA-256 0bbc82a4adbc6665…

MALICIOUS

PDF

83.5 KB Created: 2021-06-25 13:18:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 784b284b78abe590b9669d7d582fbb7e SHA-1: a3b2d0f24e4f67da331a00b68dad33b647b7917c SHA-256: 0bbc82a4adbc666565f0aa7713453af4cef24cf2e886f5923415acac7288e30f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains a link farm pointing to multiple compromised websites, likely as part of a phishing or malware distribution scheme. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it is designed to redirect users to malicious content, potentially exploiting vulnerabilities or attempting social engineering.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://shrmivirtual.org/wp-content/plugins/super-forms/uploads/php/files/0d7c21475cb8e2159bc472ab44405eac/giretogenibarilewaner.pdf In PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160af97f0c8144---29898907318.pdfIn PDF document text
    • https://www.pharmaright.ca/wp-content/plugins/super-forms/uploads/php/files/9a7ki3hu4n1eem7alk0295rhgr/15183612608.pdfIn PDF document text
    • https://firsatpin.com/calisma2/files/uploads/11647515079.pdfIn PDF document text
    • http://braintradingbcn.com/wp-content/plugins/super-forms/uploads/php/files/ec9dae517f4f17d8e508b1157de8b366/tovozawag.pdfIn PDF document text
    • http://robwalker.net/fckupload/file/20487542702.pdfIn PDF document text
    • http://eperon-kochersberg.com/img_db/99629349917.pdfIn PDF document text
    • http://www.loicadesacavem.pt/wp-content/plugins/formcraft/file-upload/server/content/files/1609f3a789921e---liwufemixanev.pdfIn PDF document text
    • https://advancedcheckcashadvance.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070ba82de7dd---31194360446.pdfIn PDF document text
    • http://travelci.ru/ckfinder/userfiles/files/90150020126.pdfIn PDF document text
    • http://maasmartcity.com/userfiles/file/bapemumilemen.pdfIn PDF document text
    • http://thehawthornnyc.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086873802f3d---85601917538.pdfIn PDF document text
    • http://terapie-psi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160a22f05c2d56---92396487394.pdfIn PDF document text
    • http://timandlor.com/userfiles/file/28872316651.pdfIn PDF document text
    • https://www.thecandystoresudbury.com/wp-content/plugins/super-forms/uploads/php/files/tjbi38tr32tajpv94ev5udbef0/subukigabikexipu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=business+analysis+lecture+notes+pdfPDF 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_off0000e14f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE14F 18292 bytes
SHA-256: e1d7d36c0ec5590dc4babd3e097c2e51ece14c19dd2d34e7cd91c3c6bba64fb3
font_01_sfnt_off0001102d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1102D 10880 bytes
SHA-256: 0b213097966a6daaedad48c74664349670a3b9619d0ef09bc94c7a0fac074a0c
font_02_sfnt_off00012989.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12989 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1