Malicious PDF — malware analysis report

Static analysis result for SHA-256 cbedd3e85b287caf…

MALICIOUS

PDF

80.6 KB Created: 2021-09-05 18:10:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 12ac3381e531204b599e69ae83598c24 SHA-1: 1db1ca48e13f1cddc1419d8592598625243baedb SHA-256: cbedd3e85b287cafd744e6ef497a470332bc9205001c365a6fe68395870a3907
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as a malicious PDF by multiple heuristics and a machine learning classifier, specifically flagging it as an advance-fee scam lure. The document body is heavily obfuscated, but the presence of numerous external URIs, many pointing to compromised CMS uploads or disposable hosting, suggests a phishing or redirection mechanism. While no scripts were explicitly extracted, the PDF format itself can embed JavaScript, which is often used to facilitate these types of scams by redirecting users to malicious websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://allytemp.ru/uplcv?utm_term=cuisinart+12+cup+thermal+coffee+maker+manual
    • http://identik.hu/editor_up/tanixilovofew.pdf
    • http://xn--b1afklwjc5g.xn--p1ai/ckfinder/userfiles/files/8040719422.pdf
    • http://sakem.org/userfiles/files/gisid.pdf
    • http://sonnenheizungen.ch/fckeditor/editor/images/file/25649478153.pdf
    • https://bentzendesign.se/wp-content/plugins/formcraft/file-upload/server/content/files/1607b9b401c9b4---34216564457.pdf
    • http://tokyo-sanritsu.com/userfiles/file/15196381417.pdf
    • http://essentielles-theater.de/UserFiles/File/73315709837.pdf
    • http://reicar.dk/userfiles/file/16589882092.pdf
    • https://petala.gr/userfiles/file/23903184797.pdf
    • http://kystop.com/wp-content/plugins/super-forms/uploads/php/files/ipf957rkn9u5a89v68obecg8l0/fusumalipigogajimilujibuv.pdf
    • https://ecoinkworld.com/wp-content/plugins/super-forms/uploads/php/files/6a29d5ac5db1c28bac41a5dfb70a4e9f/16350690630.pdf
    • https://realxenon.ru/uploads/files/sefosomegomovawatosek.pdf
    • https://fellowpeo.com/wp-content/plugins/super-forms/uploads/php/files/9054bfe37289615c33c927ef5d136b5f/jakugaki.pdf
    • http://kientrucphatloc.com/upload/files/duxegiroxinexudumoxove.pdf
    • http://www.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/a4l1eutalhp27ln9t0p74tiia3/toxajexufubomi.pdf
    • http://www.sensible-seeds-premium.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a87fc1735ee---21290311918.pdf
    • https://locoffice.ru/userfiles/file/piberoribori.pdf
    • http://global-poseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f7e0147659a---6384039417.pdf
    • https://www.grandeprairie.org/wp-content/plugins/formcraft/file-upload/server/content/files/160b4015a333b2---70944796005.pdf
    • http://www.pranabkumar.com/fckimages/file/fejolorijida.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_off0000d56c.bin
1414b5fd8f392aa36f2281a5ceb34e92de7a07f32726a3cbe3079a7ba38c7a65
pdf-font-stream PDF embedded font (sfnt) at offset 0xD56C 17612 bytes
font_01_sfnt_off00010301.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x10301 16792 bytes
font_02_sfnt_off00011b18.bin
b5144e4a6c4483faa9282376d976c43a0645307189b0f3680599e1952e29c292
pdf-font-stream PDF embedded font (sfnt) at offset 0x11B18 11140 bytes