Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f5c9c94959fded7…

MALICIOUS

PDF

85.2 KB Created: 2021-06-28 20:57:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: da8c9d19cbcf2c85ce980f26d7163630 SHA-1: e2cdf007f810631a0010a921554e24db4ead32d8 SHA-256: 1f5c9c94959fded72147da143572f32cf3ed923b645ef8f35b025dbfce48ea96
196 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, and exhibits characteristics of an advance-fee scam. It contains numerous links to PDFs hosted on compromised WordPress sites, suggesting a link farm designed to distribute malicious content. The presence of these links and the overall structure strongly indicate a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9972

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://msr-hudsonproperties.com/wp-content/plugins/super-forms/uploads/php/files/dad13252a440f96d6a109529897015ed/mogezururuvejurulaja.pdf In PDF document text
    • https://amezdigital.com/wp-content/plugins/super-forms/uploads/php/files/05b5df7b90d21892fd36cd14e0a0070c/xorufufonupojajetu.pdfIn PDF document text
    • http://artmetinc.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609abf34f0f60---wepudajudodudufikeliwom.pdfIn PDF document text
    • http://www.thelawchamber.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ffc6272c03---8311178829.pdfIn PDF document text
    • https://radmangroup-ye.com/rgfiles/file/61664625229.pdfIn PDF document text
    • http://aliglobshop.com/userfiles/file/89535554501.pdfIn PDF document text
    • http://automozg.by/upload/editor/files/8724796843.pdfIn PDF document text
    • http://studiogaleazzo.eu/userfiles/files/nagubijaxepu.pdfIn PDF document text
    • https://www.aserspa.net/wp-content/plugins/super-forms/uploads/php/files/60lpc4gsqk1fq0nuaa5215bhc6/wubuxexoxemevelato.pdfIn PDF document text
    • https://www.generalutilities.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080e53eef8c7---sipixafugogizigabababitem.pdfIn PDF document text
    • http://sodrex.pl/userfiles/file/20224950073.pdfIn PDF document text
    • https://spazmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f41b3ab8c2---31638748788.pdfIn PDF document text
    • https://backcountryplayground.com/wp-content/plugins/super-forms/uploads/php/files/4ecba8f82373edf29615e1f2894caf11/nuvovid.pdfIn PDF document text
    • https://www.justgym.co.za/wp-content/plugins/super-forms/uploads/php/files/m7njsg28ue2rsg9vm3e9f91vrf/39990395469.pdfIn PDF document text
    • http://maxitelt.no/wp-content/plugins/formcraft/file-upload/server/content/files/160a8fa362f074---rutonomutox.pdfIn PDF document text
    • http://csc0532.com/userfiles/file/20210611102208_cgtdy5.pdfIn PDF document text
    • https://www.reachcast.ca/wp-content/plugins/super-forms/uploads/php/files/0e8d9482a870136ea953318a9852928f/menofakusejalukipiwilo.pdfIn PDF document text
    • https://www.harasportcenter.com/wp-content/plugins/super-forms/uploads/php/files/j1ds1cs3o2g4d5eqfru45aquta/punodubepofivuwebuje.pdfIn PDF document text
    • https://humanistbeauty.com/wp-content/plugins/super-forms/uploads/php/files/ro61hl99jh9qkdftgfebjr3rch/31618870521.pdfIn PDF document text
    • https://sportli.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/1609dca4678910---81398567400.pdfIn PDF document text
    • http://tuzvedo.hu/elemek/file/47560918181.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=how+to+put+multiple+photoshop+files+into+one+pdfPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e9e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9E9 17304 bytes
SHA-256: 232d0c8ec48b9eb35068f5c461edd045179bda9bc411fa5b011edff171fafa04
font_01_sfnt_off00011727.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11727 10676 bytes
SHA-256: 9065a4206d7bf0a2b428bfcc82c2e7a351193bae1a4e945b8d27c36b2f0a2354
font_02_sfnt_off00012f6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F6E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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