Malicious PDF — malware analysis report

Static analysis result for SHA-256 f8012e6d78726eb1…

MALICIOUS

PDF

86.1 KB Created: 2021-06-27 01:38:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: bd6b1f7f7be0ae3b96d43ceeddddbf65 SHA-1: a0731e8b3202aaac802865998885bb477f661f4b SHA-256: f8012e6d78726eb16d405620d164b280018c8faa23962e2992f4f7c25fa35622
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document exhibits characteristics of an advance-fee scam, with lures related to lottery winnings or parcel delivery. While no scripts were directly extracted, the presence of numerous embedded URLs pointing to potentially compromised websites suggests an attempt to redirect users to malicious content or phishing pages. The ClamAV detection and ML classifier further support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9950

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
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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 http://ne-moloko.ee/wp-content/plugins/super-forms/uploads/php/files/2f7bebf5349c5f590c9652365ba900b8/16537193782.pdf
    • https://latework.cz/soubory/49799660787.pdf
    • https://razvozka24.ru/wp-content/plugins/super-forms/uploads/php/files/a570ee9e93e8fc26ec29d297d017e02f/3216490997.pdf
    • http://tomnhenryanderson.com/clients/8/8a/8a1068334c160bb49438aafe8043afff/File/6772105365.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160909d77ef152---taxitoj.pdf
    • https://bykevin.com/wp-content/plugins/super-forms/uploads/php/files/5676bb4eb6467e045b7e807dc28cafa3/96414116685.pdf
    • https://brandonsmilesdentistry.com/wp-content/plugins/super-forms/uploads/php/files/04tjg8oo9o9a08bse43eohbfa1/bigewedakuva.pdf
    • https://www.nuyew.academy/wp-content/plugins/super-forms/uploads/php/files/9906982d91f136fb7c017c5d7fecaafc/zoturinijokaginitinu.pdf
    • https://takiminsahada.com/wp-content/plugins/super-forms/uploads/php/files/o27jpv23iumd4pt332sh5nqstp/45300769382.pdf
    • http://abwessex.com/uploads/files/zulufifokeb.pdf
    • http://teraval.cz/res/file/79188595742.pdf
    • https://polskieplytki.com/wp-content/plugins/super-forms/uploads/php/files/96a62ab50e78b91d1606c8ea81bb4422/43004864776.pdf
    • http://almar-bus.pl/userfiles/file/73367417223.pdf
    • https://alakharia.com/public_html/userfiles/file/91491551991.pdf
    • https://www.truesdalepainting.com/wp-content/plugins/formcraft/file-upload/server/content/files/160710122cbdd6---4352811590.pdf
    • http://zuche0551.com/upload/file/zogijaxavimusaku.pdf
    • https://mandalaconfeccao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c243e55a87f---10881850184.pdf
    • https://salvamontbihor.ro/app/webroot/files/userfiles/files/16559016631.pdf
    • https://rowadalbyt.com/userfiles/files/4973926156.pdf
    • https://alenakovalchuk.ru/wp-content/plugins/super-forms/uploads/php/files/c46bab39f39f3f7439e7bba705ecc65d/73407184741.pdf
    • http://homeopathyhongkong.cn/files/mezoxetazoraravi.pdf
    • https://ridersshop.it/file/ludukapewojesu.pdf
    • http://mt-filtration.com/uploaded/file/211781351860bc3a8bae94e.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=cares+act+and+401k+withdrawal
    • 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_off0000eb91.bin
fbb64be711783983428ced4da25c40df4c1fcc62b8c5d8ea4699a4aed689f3f3
pdf-font-stream PDF embedded font (sfnt) at offset 0xEB91 17096 bytes
font_01_sfnt_off00011882.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x11882 16792 bytes
font_02_sfnt_off00013099.bin
1232d8508600dffcd5778a4c6b46e4d036f4e8c51715cf693ccb7a7fb42006b9
pdf-font-stream PDF embedded font (sfnt) at offset 0x13099 10808 bytes