Malicious PDF — malware analysis report

Static analysis result for SHA-256 1549f2cac68e127a…

MALICIOUS

PDF

85.9 KB Created: 2021-08-24 14:17:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 267e05894307f83f3ce4250bfee03271 SHA-1: 338d20de4e7ebb5f59017330a9aeedbeca2da3f6 SHA-256: 1549f2cac68e127a705c550db52c8ecdf55c908fa27788ef8bd0747538aa96e9
156 Risk Score

Malware Insights

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

The sample was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links pointing to potentially compromised websites, suggesting a phishing or scam campaign. The PDF structure and embedded links are consistent with techniques used to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://sicilyontable.it/userfiles/files/salemuduvewavovadajokizob.pdf
    • http://classicalgardenornaments.com/uplds/file/18208602006.pdf
    • http://xn--80aab8aioy.xn--p1ai/userfiles/file/4841954184.pdf
    • http://triumphtoday.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a5c0f28d5d8---kejapoxunoloxemerafu.pdf
    • https://pmfegypt.com/userfiles/files/43269968194.pdf
    • http://www.hcibatiment.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160b86d99209d5---noxiropinirewuwetutoki.pdf
    • http://boston.pl/fck_pliki/file/53899896998.pdf
    • http://eprdel.cz/userfiles/file/donumapepogopivulepigejo.pdf
    • https://regeneracion-capilar.com/wp-content/plugins/super-forms/uploads/php/files/79eb0a522055a3dd097ab8a99555a130/mesurugedeserunu.pdf
    • https://uppersanduskyrotary.com/cms/files/File/dugadajujevagazalovewij.pdf
    • http://mientrungpetrohotel.com/users/files/98012681882.pdf
    • http://namjapizza.com/app/webroot/files/94927776753.pdf
    • https://hse.tw/upload/file/44506862116.pdf
    • http://cnkls.com/userfiles/file/1625635456.pdf
    • https://shinko-tw.com/UserFiles/file/mawivamipaneridid.pdf
    • http://www.onegelha.com/wp-content/plugins/super-forms/uploads/php/files/6fc8fe6dd794ab4fd6d114a3a481cae6/24174245858.pdf
    • http://kassa.pl/userfiles/file/423132579.pdf
    • http://windowsplusllc.com/ckfinder/userfiles/files/wiwezut.pdf
    • http://marmaraisg.com/images_upload/files/59336360796.pdf
    • http://ecbpolska.pl/wp-content/plugins/super-forms/uploads/php/files/337fd2d634d83f922449bf98fe52423d/17725249012.pdf
    • https://isabellepieman.com/userfiles/file/mikevoguvebikapidalem.pdf
    • https://spherule.org/wp-content/plugins/super-forms/uploads/php/files/dki74chedgcoda5mcjeq58paj3/bopefoxubup.pdf
    • http://sosnovgeo.ru/userfiles/file/nelodazalufurujufofutek.pdf
    • http://timecraftz.com/userfiles/file/16927879408.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=1970+chevy+malibu+project+car+for+sale
    • http://lovewhereyoulv.wpengine.com/wp-content/plugins/super-forms/uploads/php/files/4d69fe53f22805b89854246a90275b02/47092547583.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_off0000e7a5.bin
095e80c2de530ef1001c57c141b3ee47e3e6179d248d1446b73f17944fa876d8
pdf-font-stream PDF embedded font (sfnt) at offset 0xE7A5 16980 bytes
font_01_sfnt_off000113cc.bin
feca020632a4dd6334f546eb8bc520695f3806fc65af90578083f2935f03ba7d
pdf-font-stream PDF embedded font (sfnt) at offset 0x113CC 11488 bytes
font_02_sfnt_off00012ee0.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x12EE0 16792 bytes