Malicious PDF — malware analysis report

Static analysis result for SHA-256 15779fa11f910e5e…

MALICIOUS

PDF

85.8 KB Created: 2021-09-18 17:50:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 1aea271fc4c4ce6330312a1e847004cd SHA-1: 290cfb1485e4059ef9b4fd1c09f7f08311e86b98 SHA-256: 15779fa11f910e5e7d3de3ae2290847d6548c64440e5c78a69550ec59d1f683b
156 Risk Score

Malware Insights

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

The PDF file was identified as malicious by ML classifiers and ClamAV, flagging it as a phishing trojan. Heuristics indicate it functions as a link farm, with many embedded URLs pointing to various domains, including compromised WordPress sites and disposable hosting. This suggests an attempt to lure users to malicious websites for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9905

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 http://belloverde.net/emailer/file/xigamotudaxuxerumabud.pdf
    • http://theleadershipworks.com/PO2/UPFILE/userfiles/files/42440574387.pdf
    • https://magnettoptan.com/upload/ckfinder/files/wagipod.pdf
    • http://swaving-stalinrichting.nl/ckfinder/userfiles/files/77592991462.pdf
    • http://chizclean.ru/files/fck/file/40896936996.pdf
    • http://studioambienteterritorio.it/userfiles/files/rukejetovevexikomezusote.pdf
    • http://yeongwonenc.com/userfiles/file/92917627184.pdf
    • http://pololanna.com/user_img/files/xejowisu.pdf
    • https://gccpay.net/wp-content/plugins/super-forms/uploads/php/files/fede729cca21e850c34a9e60f4667d22/88018976222.pdf
    • http://rovitek.com/userfiles/file/20285533686.pdf
    • http://spiregene.com/image/files/20210908_222507.pdf
    • https://thaiwoodengames.com/files/upload/files/fofazo.pdf
    • https://doitsolutions.co/wp-content/plugins/super-forms/uploads/php/files/8a6b050d51359e9b2f92c2ba42ed48ac/81123308448.pdf
    • http://emilymillerlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/800576385.pdf
    • http://atomicattack.com/atomic/fckimages/file/livewedavikerowi.pdf
    • http://dealershop.es/userfiles/file/88457364545.pdf
    • https://pabxlg.com/userfiles/file/50104816531.pdf
    • http://www.centralperdana.com/file/43474036257.pdf
    • http://balogmihaly.hu/UserFiles/file/fadalabosasigovux.pdf
    • http://robwalker.net/fckupload/file/jetewonediwawojutazu.pdf
    • https://liantoong.com/archive/upload/files/pijugimelog.pdf
    • http://www.enjoyvaltellina.it/admin/ckfinder/userfiles/files/22855216844.pdf
    • http://timebymtm.com/upload/files/gotijukixu.pdf
    • http://omni-links-europe.com/images/blog/file/nagarebew.pdf
    • http://daming-school.com/userfiles/file/lexaxexarepozixator.pdf
    • https://weblative.com/wp-content/plugins/super-forms/uploads/php/files/ci097dit44f681lgdjtf3lqupr/wenipetipawela.pdf
    • https://www.idromeccanicasrl.com/idromeccanicasrl.com/wp-content/plugins/super-forms/uploads/php/files/9764214ccea28586cdbe735841df9cda/petamek.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=wombo+app+songs
    • 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_off0000e728.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xE728 16792 bytes
font_01_sfnt_off0000ff3a.bin
c81599831cd4162728dc0940f74e23268bb5ed438e0ded78748d1fa3b87a8f0a
pdf-font-stream PDF embedded font (sfnt) at offset 0xFF3A 19300 bytes
font_02_sfnt_off0001326e.bin
919370431fd08cd2542fc83b00a66b5c74fad0aceab05b76806e017e3e6e0be4
pdf-font-stream PDF embedded font (sfnt) at offset 0x1326E 10260 bytes