Malicious PDF — malware analysis report

Static analysis result for SHA-256 874505cb0264717a…

MALICIOUS

PDF

84.4 KB Created: 2021-09-15 17:31:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 6a1cf56d507c02e360c349c414497877 SHA-1: 241e97760da5f96c88b0505f9a0d68a8cf2d2d08 SHA-256: 874505cb0264717a84b57618b4361ff2907e379249c7d554ffc900f5d2108a65
196 Risk Score

Malware Insights

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

The PDF document exhibits characteristics of an advance-fee scam, presenting lures related to lotteries, prizes, and fund delivery. It contains numerous external links, many pointing to compromised CMS uploads or disposable hosting, suggesting an attempt to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://archism.ru/uplcv?utm_term=rupaul+13+online
    • http://natalieshuff.com/uploads/file/41521724034.pdf
    • http://goodfortune.hk/UpLoadFile/file///dexafu.pdf
    • https://2ruoteexpo.it/ckfinder/userfiles/files/xadaneworapizomasopotedon.pdf
    • http://srividyaastrology.com/userfiles/file/denija.pdf
    • https://www.getfitcrew.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613eedaf1d7f4---63887333044.pdf
    • https://transmilenio.net/datamont/userfiles/file/3628253833.pdf
    • http://e-photo.lv/ckfinder/userfiles/files/21792516217.pdf
    • https://curtain.jinware.com/upload/files/zawegijojavamurino.pdf
    • http://anipetkingdom.com/webroot/img/files/vowifitomedovinezeniji.pdf
    • https://leunamgroup.com/wp-content/plugins/super-forms/uploads/php/files/bb374c668502a299bf558ba7ca84b6e7/rujaxekadiwisemixogi.pdf
    • http://urduhadith.org/survey/userfiles/files/18421319450.pdf
    • https://altinhediyeler.com/calisma2/files/uploads/59989648133.pdf
    • http://opuspoint.com/ckfinder/userfiles/files/38464594704.pdf
    • https://icrs-as.com/userfiles/file/12002095645.pdf
    • http://ytovietnam.net/ckfinder/userfiles/files/78327991871.pdf
    • https://christembassybarking.org/wp-content/plugins/super-forms/uploads/php/files/8527a938287f1a578920c92212034707/bagirujiguvinumawesowutap.pdf
    • https://consultemergingmarkets.cubsindia.com/files/62476432705.pdf
    • http://urduhadith.org/survey/userfiles/files/92030504615.pdf
    • http://acutecardio.ru/sadm_files/6998127718.pdf
    • http://ptichile.cl/userfiles/file/logex.pdf
    • http://aasghsflqsae.handylover.com/upload/files/kodinawatur.pdf
    • http://bularz-auto.pl/images/userfiles/file/zanivoteganomebi.pdf
    • http://mentor-tutor.com/newGroserLikeProject/uploads/files/gevawirofiluduvalaxaxe.pdf
    • https://iword.de/userfiles/file/16703181712.pdf
    • https://littleitalypizzany.com/nbloom/fckuploads/file/72265890037.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_off0000e602.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xE602 16792 bytes
font_01_sfnt_off0000fe14.bin
aa4fced58ed23e975ab5149b6637367e51b8feb3e3553f72123e94bb10241135
pdf-font-stream PDF embedded font (sfnt) at offset 0xFE14 17964 bytes
font_02_sfnt_off00012d5b.bin
20e808dcfeda122b4917264ea86e94c4bbe7dfa4a2ae1a5d5305542ca460920d
pdf-font-stream PDF embedded font (sfnt) at offset 0x12D5B 10248 bytes