Malicious PDF — malware analysis report

Static analysis result for SHA-256 478ce9fecfe194e4…

MALICIOUS

PDF

86.7 KB Created: 2021-09-08 06:23:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: bc49e5130585a9ff0aa279b60e409452 SHA-1: f8a95140005aa5937804564e9ddf5b6cfded216b SHA-256: 478ce9fecfe194e476e8b75ba262939e8d15eaa659429a5ec2852173d1c57129
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, containing numerous URLs that point to external resources, some of which are hosted on compromised WordPress sites. The primary purpose appears to be directing users to potentially malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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 https://bjjewels.net/nbloom/fckuploads/file/rujexugubiwovenegolara.pdf
    • http://musicpark-live.de/userfiles/file/36728678464.pdf
    • https://completecollegestrategies.com/wp-content/plugins/super-forms/uploads/php/files/331d0b813f853b115ab93097d8812c08/zorazimufosizuneb.pdf
    • http://dgjinhak.kr/DATA/upload/files/202105310120146342.pdf
    • https://aashianarealty.com/file/lekolesovunufabesilitugol.pdf
    • https://moma-restaurant.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ebae4a9bd3---kisofozevumi.pdf
    • https://youstore21.com/wp-content/plugins/super-forms/uploads/php/files/5635b127367dc1e485081578e2d8460a/mamutemenegoguja.pdf
    • http://boletin.alicantehosteleria.com/lib/ckfinder/userfiles/files/21385390018.pdf
    • http://jnafarms.com/clients/864068/File/71360688590.pdf
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/ohobeks55385sr0fjfpa931rf5/wosakofapa.pdf
    • http://giadinhlaurenso.org/upload/files/lakifakejaresilubo.pdf
    • http://dodici12.ru/wp-content/plugins/super-forms/uploads/php/files/hp236g45cn3i7qc0i025l3a4j1/87056337300.pdf
    • http://steakclubhn.com/campannas/file/jakusowenurivojob.pdf
    • https://kalatranslation.co.uk/wp-content/plugins/super-forms/uploads/php/files/4994sa13dtei8vjpqs2uehmpct/96042760386.pdf
    • http://veganogle.es/uploads/ckfinder/files/24219614517.pdf
    • http://bluekeydigital.com/images/pic/file/gavaretomomaz.pdf
    • http://sushikyototogo.com/uploads/files/buxelisatep.pdf
    • https://groupunsur1.com/contents//files/23969358360.pdf
    • https://retrofitoman.com/ckfinder/userfiles/files/14855479138.pdf
    • http://flemingfamilies.org/clients/8/8a/8af36a28baf44bfc7b8a7004fb4eaede/File/74997283716.pdf
    • https://kurek-rowery.pl/user_pict/file/xiboles.pdf
    • http://bridgesonthepark.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c3df694381---bekedof.pdf
    • http://richmore.kr/uploadfile/fckeditor/file/buwabu.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=aqeedah+tahawiyyah+commentary+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_off0000e0d3.bin
a1d093e9771e448a2faff162a96f13ee8dd2d9df67ef05afdb49277e980255ba
pdf-font-stream PDF embedded font (sfnt) at offset 0xE0D3 22560 bytes
font_01_sfnt_off00011b98.bin
df7afc8059f95f1454b39413b31ce023fbeaf065f9a15c5963225386504d8621
pdf-font-stream PDF embedded font (sfnt) at offset 0x11B98 10996 bytes
font_02_sfnt_off000134cc.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x134CC 16792 bytes