Malicious PDF — malware analysis report

Static analysis result for SHA-256 1bb6087efc2c18a5…

MALICIOUS

PDF

120.6 KB Created: 2021-06-27 15:24:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 55cef2bcddded972662449eadd92d09c SHA-1: a8a5375cb3b92108e4171ab89a4deb3725f448af SHA-256: 1bb6087efc2c18a586800c32f8faac562d543e0d9643e941421742357a320286
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious File

The PDF file was flagged by multiple heuristics as malicious, including a specific ML classifier and a critical ClamAV detection. The heuristics indicate the document is designed as an advance-fee scam, using lures related to lotteries, prizes, and parcel delivery. Numerous URLs pointing to compromised websites hosting similar PDF files were extracted, suggesting a campaign distributing this type of phishing content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9944

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://www.paparazzirestaurant.com.au/wp-content/plugins/super-forms/uploads/php/files/73385401d6b7a1d0a83c3431aa959f78/44235197320.pdf
    • https://nailseasupportgroup.com/wp-content/plugins/super-forms/uploads/php/files/a509ad1716ec11f64912be42a3e2d81d/fipobemanuwawirabolenalos.pdf
    • http://briarcliff70.com/clients/874901/File/kemewosizuzoxovovaka.pdf
    • https://weddingitaly.jp/images/file/jesolabuvomavelitisokimib.pdf
    • http://www.oknookna.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160c005747e58d---xumopemubusaxupodunujulok.pdf
    • http://www.vitrierbxl.be/wp-content/plugins/formcraft/file-upload/server/content/files/1607ae0d7c0b61---36091333135.pdf
    • https://wholisticvibrations.com/wp-content/plugins/super-forms/uploads/php/files/6e7f9d5ad1a36d408578dad2c103516d/doxexudenujotudoxogo.pdf
    • https://gccpay.net/wp-content/plugins/super-forms/uploads/php/files/3c50ab50b711120ba282105ae9db0f22/guxuzowarudoravomonekowuk.pdf
    • http://deshdunya.com/blogimage/file/39850802528.pdf
    • http://countrysquirefoods.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a56f67efeaa---93272738642.pdf
    • https://kis-u.com/page_data/file/20210618022224.pdf
    • http://vodnik48.ru/content/file/fegifuzu.pdf
    • https://www.straightmyteeth.com/wp-content/plugins/super-forms/uploads/php/files/f2aa90cef1d69c760438c5a736a32fd6/82903719982.pdf
    • https://socialchangefactory.org/wp-content/plugins/super-forms/uploads/php/files/8941b807690cc72840ce11d693bf16e0/sevigamowatokemazer.pdf
    • https://mangonebike.com/uploads/file/79020175514.pdf
    • http://www.maoles.com/wp-content/plugins/formcraft/file-upload/server/content/files/16092d0edac810---11241523433.pdf
    • https://olgapopovaphoto.com/wp-content/plugins/super-forms/uploads/php/files/52b343119e5aac5c6ed3fb97c9d41ddf/gudibatusofepuvuno.pdf
    • https://cal.lighting/wp-content/plugins/super-forms/uploads/php/files/c4953d8085292f62ece42745e23872e3/tipadivatunolukudavi.pdf
    • http://www.consorcio.edu.pe/wp-content/plugins/formcraft/file-upload/server/content/files/1608502b6be82b---dijire.pdf
    • https://villatoscana-pi.it/userfiles/file/kanamutuwunubosamemuja.pdf
    • https://www.myosiaffiliate.com/199trust/img/file/nuburevonopifefix.pdf
    • http://togetherwewalkny.org/clients/2/24/2411cc079aa0f0d7fd57f81c6163ecfd/File/57076859971.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=brought+me+up
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00015813.bin
6f72bfe523f1a11dcd43bea877683d3ea74033ad83579e8d680d2b83e789c297
pdf-font-stream PDF embedded font (sfnt) at offset 0x15813 18208 bytes
font_01_sfnt_off00017524.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x17524 16792 bytes
font_02_sfnt_off00018d3b.bin
873ef365de1d6e093ebfbf66b88395b223927741679b96320571a3598f0c1a6f
pdf-font-stream PDF embedded font (sfnt) at offset 0x18D3B 10280 bytes
font_03_sfnt_off0001a463.bin
0b4e96e8db1b684222e9b736d8f7194d58fd64dde5164526cd76994b936b9a6c
pdf-font-stream PDF embedded font (sfnt) at offset 0x1A463 19184 bytes