Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c0da799076019ec…

MALICIOUS

PDF

84.8 KB Created: 2021-09-05 22:44:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 7bff8f9c0cfa09b00c6bd262e6d88d46 SHA-1: 19939d4b920bc83efc96eac6af7530345d4a2268 SHA-256: 0c0da799076019ec6fe7f1da5fa80dd0f3f720e136824fec1dc35b95cb560c47
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file is identified as malicious by ML classifiers and ClamAV, indicating a phishing or malware distribution attempt. It contains numerous links to external websites, many hosted on compromised or disposable domains, suggesting a link farm designed to redirect users to malicious content. The document body is heavily obfuscated, but the presence of external URI heuristics and the overall structure point towards an attempt to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://menu2uplus.com/images/file/63037242992.pdf
    • https://www.golaw.net/wp-content/plugins/formcraft/file-upload/server/content/files/160aef3adf09ca---18959584644.pdf
    • http://www.lavalledesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087a82900a79---nowazezow.pdf
    • http://timebank.ru/sites/default/files/photos/pagefile/xeburelara.pdf
    • http://mywayrtk.info/userfiles/file/kuzezozawizusuralofu.pdf
    • http://bizwd.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082e00474cb5---97524687513.pdf
    • http://botosani.ro/img/uploads/file/3575218593.pdf
    • https://maconlux.lu/userfiles/files/zufes.pdf
    • http://www.infranetltd.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609665b82012b---mawivifotef.pdf
    • http://emeraldoutback.com/clients/f/f6/f61299a274fa8fdb0c00f5b1ed511d42/File/gasibuzuvofodanajap.pdf
    • http://abcbyspu.net/ckfinder/images_store/files/82797731124.pdf
    • https://vanchuyenduongsat.vn/upload/files/84691128148.pdf
    • https://homeaestheticsllc.com/wp-content/plugins/super-forms/uploads/php/files/bf7518553d5c3e38f33f63e60b1d5e53/jidezawolinijeku.pdf
    • https://amiablediamonds.com/wp-content/plugins/super-forms/uploads/php/files/e7aee9ce7c30a17eb15d4d53660d780b/71410266882.pdf
    • http://nhaphangmy.us/upload/files/9242560023.pdf
    • https://www.adelaarenergy.com/wp-content/plugins/super-forms/uploads/php/files/sojkjlhcdfb45njr5ple0f8nhj/lamulavi.pdf
    • http://mploa.com/clients/2/2c/2ccb326c3583e393996f575e36ee3974/File/37051656233.pdf
    • http://tccsrl.org/userfiles/files/49157744201.pdf
    • https://promocionesnma.com/wp-content/plugins/super-forms/uploads/php/files/d55b7872d1906d0ca2624b18efe710de/53547564232.pdf
    • http://photo-preiss.com/upload_files/files/motijirima.pdf
    • http://www.immiflex.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c85fe0ee16---vefasosemavuv.pdf
    • https://walkandsmile.com/userfiles/file/vuvafazoze.pdf
    • http://donghocitizenchinhhang.com/uploads/userfiles/file/46912817885.pdf
    • http://bpsstudio.hu/uploads/rizerirewegi.pdf
    • https://www.getfitcrew.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c92fd6b5548---zenorop.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=hadith+compilation+pdf
    • 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_off0000dffa.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xDFFA 16792 bytes
font_01_sfnt_off0000f80c.bin
24fa98ec7dc47b130fad63d1960c63027ea5f6e6203565915d2e7ccf66f1694b
pdf-font-stream PDF embedded font (sfnt) at offset 0xF80C 20684 bytes
font_02_sfnt_off00012e0a.bin
d72f01711856cada2d83585a1c1fa150a971c88b750788ea40cfcce94518b29b
pdf-font-stream PDF embedded font (sfnt) at offset 0x12E0A 10476 bytes