Malicious PDF — malware analysis report

Static analysis result for SHA-256 7932e70334515071…

MALICIOUS

PDF

82.3 KB Created: 2021-09-18 19:03:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 780f21e62d1f76ae85b8b05494e53445 SHA-1: 59f333e5f21003942fb9aa44d8954ae23f358962 SHA-256: 7932e70334515071412a210115bdfaf215f80deb6c9d475edc4a3a31ce2cb814
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, specifically identified as a phishing or trojan variant. It contains a link farm with numerous URLs hosted on potentially compromised or disposable domains, suggesting an attempt to redirect users to malicious content or phishing sites. The presence of external URI links and the classification as a link farm indicate a probable phishing or malicious redirection attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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://neonatal-surgery.ru/userfiles/files/vepenewikuwiw.pdf
    • http://modamoda.nl/uploads/pic_lib/file/1406600135.pdf
    • http://botosani.ro/img/uploads/file/98380024153.pdf
    • http://malabarisproducoes.com/arquivos/files/fikelugevofikobejizeke.pdf
    • https://stpatswatertown.org/ckfinder/userfiles/files/lukanepalexugikadur.pdf
    • http://www.finanzanlagen-honorarberatung.de/wp-content/plugins/formcraft/file-upload/server/content/files/16145cd163b814---2081690432.pdf
    • http://grani-tonkogo-mira.ru/wp-content/plugins/super-forms/uploads/php/files/09f0dc77bdadd195ded0f4b7f9610af6/19642604070.pdf
    • http://xn----dtbsgbucafmmaf.xn--p1ai/servimages/editor/files/88537330184.pdf
    • http://bolt.fo/public_html/userfiles/files/tinovifevuvavulev.pdf
    • https://adeptos.clevercloud.pt/images/items/files/95948988499.pdf
    • http://kubablimel.pl/Image/files/vulitotipuf.pdf
    • http://www.sunarmisir.com.tr/wp-content/plugins/super-forms/uploads/php/files/i19q9paq4p8kf8mgkv03c6ush4/jinifowarafuba.pdf
    • http://www.impactit.in/ckfinder/userfiles/files/57772418653.pdf
    • http://www.letnifestiwal.pl/ckfinder/userfiles/files/zuruzezimi.pdf
    • http://alexandersorokolaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/8788686356.pdf
    • https://eatorhours.org/e-bussiness/fckimages/file/22495166599.pdf
    • https://fainitelecommunication.com/public/editorfiles/file/88861046434.pdf
    • http://zamgph.com/uploads/file/031958495231.pdf
    • http://hndgyl.com/v15/Upload/file/20219121526152511.pdf
    • http://msdoubrava.cz/foto/images/file/sibipolunol.pdf
    • http://fujieshubao.com/zk/UploadFile/file/2021091210312073499.pdf
    • https://sangolongphuong.vn/longphuong/news/files/napag.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=dofusports+live+streaming
    • 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_off0000dd86.bin
01263ff34d3682a4efb16a1850fc31f17c58ea6d2ee51abfc124bdb71e660713
pdf-font-stream PDF embedded font (sfnt) at offset 0xDD86 17360 bytes
font_01_sfnt_off00010a81.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x10A81 16792 bytes
font_02_sfnt_off00012298.bin
68618ad644e28d6f2d5f735e41c7888528fa109a62284ae5a427434580bb9de2
pdf-font-stream PDF embedded font (sfnt) at offset 0x12298 10868 bytes