Malicious PDF — malware analysis report

Static analysis result for SHA-256 86448659fec4fcb3…

MALICIOUS

PDF

81.4 KB Created: 2021-09-20 22:01:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 1f6482e63b152b57cc7dfb5d3cde3312 SHA-1: 67676a764b4bdb1adf169c83e9824dde09905045 SHA-256: 86448659fec4fcb3b038ee022f4be716e22233f81c23b8a8f100953769b03b73
196 Risk Score

Malware Insights

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

The sample is a PDF file flagged by ClamAV as Pdf.Phishing.Trojan. The heuristics indicate it contains an advance-fee scam lure, presenting lottery or prize language alongside parcel delivery requirements. It also functions as a link farm, directing users to various PDF files hosted on potentially compromised websites, suggesting an attempt to distribute further malicious content or phish for credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9833

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://best-of-geldanlagen.de/userfiles/file/68105617411.pdf
    • http://giftboxvietthuy.com/upload/ck/files/25309349577.pdf
    • https://aradovan.com/userfiles/file/65778015159.pdf
    • http://thepnguyentran.vn/media/ftp/file/sumax.pdf
    • http://veszpremkosar.hu/_user/file/8062263542.pdf
    • https://nidi.mk/ckfinder/userfiles/files/43275996534.pdf
    • https://lederstuehle-shop.de/ckfinder/userfiles/files/zatetirusurekebafaserexiw.pdf
    • https://patriot.ch/wp-content/plugins/super-forms/uploads/php/files/7p3dlqg52mk08ikrg2dr9m3iqt/masexebefaziraluzisozafo.pdf
    • http://houtackers.nl/userfiles/file/pajowidan.pdf
    • https://rachelrom.com/rescontent/file/57573317608.pdf
    • http://achilleferolla.it/userfiles/files/pozupemenonupuzulopuxor.pdf
    • https://dulsuc.cl/userfiles/file/rebemiso.pdf
    • https://proetcontra.hu/userfiles/file/48187983695.pdf
    • http://craft-personal.de/userfiles/file/88834206768.pdf
    • https://www.karavanlakesfet.com/wp-content/plugins/super-forms/uploads/php/files/b145c1b9ef8868aa4e8814d514508bbe/dejuti.pdf
    • http://stellar.ru/ckfinder/userfiles/files/42206382302.pdf
    • https://processwork.archerhuang.com/ConImg/files/fumaletoxijober.pdf
    • https://forkidsvietnam.vn/wp-content/plugins/super-forms/uploads/php/files/5tkt64jlh762tsksdof4pbeb1c/30381714232.pdf
    • http://www.orarestauratorisaf.it/wp-content/plugins/formcraft/file-upload/server/content/files/1613c25c835c30---gazuli.pdf
    • http://gyn-ordi.at/myPix/file/marenujosomexig.pdf
    • http://gaziogluenerji.com/images_upload/files/38591350730.pdf
    • https://ochronaskory.pl/pliki_user/File/7093283972.pdf
    • https://lose-weight.tw/upload/files/35376233450.pdf
    • http://laxycoffee.com/upload/files/wifavixamunuzali.pdf
    • http://thebrownbag.vn/upload/files/zesabexuvetiborari.pdf
    • http://china-baby-clothes.com/d/files/88406551505.pdf
    • https://mr-alian.com/upload/ckfinder/files/xulereraguror.pdf
    • http://ilksolar.com/Images/Media/files/80309530476.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=live+net+tv+8.0+apk
    • 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_off0000db10.bin
edc22dca5408b955b662029746d5e6c0fdab95d4576c5302066dbbfeef84411b
pdf-font-stream PDF embedded font (sfnt) at offset 0xDB10 10324 bytes
font_01_sfnt_off0000f27e.bin
5902dcdd256b4e2bf69dd087240df018fd8f7816778a6d3825e6c98c2540e6d7
pdf-font-stream PDF embedded font (sfnt) at offset 0xF27E 17704 bytes
font_02_sfnt_off00012052.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x12052 16792 bytes