Malicious PDF — malware analysis report

Static analysis result for SHA-256 28d122ed4209c743…

MALICIOUS

PDF

84.3 KB Created: 2021-07-13 05:35:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 10189c895b06a966fff9b3b659461f2d SHA-1: 119bf50514afddc4bfa8aee6b23e6144cb955b61 SHA-256: 28d122ed4209c743d6244c6ea313eb65f93b59e3b6f31666bc48818ee18b612f
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link T1059.007 JavaScript

The sample is a PDF document flagged by ML classifiers and ClamAV as malicious. Heuristics indicate it functions as a link farm, directing users to potentially compromised WordPress upload storage and other disposable hosting sites. The document's structure and content align with an advance-fee scam, likely attempting to trick users into downloading further malicious content or providing sensitive information under the guise of a prize or parcel delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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 https://die-elke.de/cms/elke_page_files/file/45221868390.pdf
    • http://omonetach.pl/foto/ilustracje/file/jumaximunerofakifodarof.pdf
    • https://agribusiness.pk/wp-content/plugins/formcraft/file-upload/server/content/files/1607882bcb65a9---ribigekawukogiviwogasitev.pdf
    • https://matras-matrasych96.ru/admin/ckfinder/userfiles/files/zoxulexivanijuraxuzu.pdf
    • http://macphersonproperties.com/clients/876251/File/liwamiso.pdf
    • http://melly-incendie.fr/img_db/luwuvogewobenowi.pdf
    • http://aven.su/userfiles/file/21378995723.pdf
    • https://pointswestliving.com/ckfinder/userfiles/files/siminosi.pdf
    • https://alarrabnews.com/images/content/content/file/66151079389.pdf
    • https://xn--1--8kcai1ck2bs.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/d9594eba026fe4a6e931a272b53a72b3/nivozapizuwebimet.pdf
    • https://fmpride.com/wp-content/plugins/super-forms/uploads/php/files/664c3917e7f1b315f73f16bae7beebce/gapokone.pdf
    • http://beerskiboot.de/img/upload/file/katomudetuvafuvavu.pdf
    • http://dienmaythanglong.org/uploads/files/94977514613.pdf
    • https://doellefjelde-mussemarked.dk/images/newsmail/file/wizoroduvu.pdf
    • https://ewms.vn/wp-content/plugins/super-forms/uploads/php/files/usvbkpdknjf71ju1lcc0qtpuul/malexupexuvutoduj.pdf
    • http://seventyfirstclassof69.com/clients/60772/File/25561916377.pdf
    • https://semut73.com/contents//files/jorigaju.pdf
    • https://paklya.su/design/img/upload/file/josadetexe.pdf
    • https://tongdaidoanhnghiep.com/app/webroot/upload/files/89269304954.pdf
    • http://www.reenactmentmarket.eu/images/wyswig_images/file/jebel.pdf
    • https://sg-design.top/wp-content/plugins/super-forms/uploads/php/files/ada05745a2c947d52aa77202ebe6e732/31538921860.pdf
    • http://moveisgarciadigital.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609b829019836---lepijetemo.pdf
    • http://www.siposferenc.hu/html/kumivezaligimi.pdf
    • http://uro-medical.pl/zdjecia/fotki/file/7638993617.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=case+study+research+and+applications+design+and+methods+6th+edition+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_off0000e59a.bin
d2882200a57edc6ede7b58d6146ee1c8e2fd378cf193f46f20d140d14d8c02fc
pdf-font-stream PDF embedded font (sfnt) at offset 0xE59A 11480 bytes
font_01_sfnt_off00010063.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x10063 16792 bytes
font_02_sfnt_off00011875.bin
df9f3a3487d94f922a5a5e2baceb84965a7a3547614fbddab9e498a6690f9c4b
pdf-font-stream PDF embedded font (sfnt) at offset 0x11875 16636 bytes