Malicious PDF — malware analysis report

Static analysis result for SHA-256 7300632005264199…

MALICIOUS

PDF

80.4 KB Created: 2021-03-28 06:12:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 90de67eeeb30c8f7ccf2180fbde9a401 SHA-1: 50e64c91f309049a4cfebe2804a4a095a09ae70a SHA-256: 7300632005264199e34e11b95b7807102c612f0a8f7aed188768b35c9db87c96
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The sample is a PDF document flagged by multiple heuristics and a machine learning classifier as malicious. It contains numerous embedded URLs pointing to external sites, many of which are part of link farms on disposable hosting, suggesting a phishing or malware distribution scheme. The ML_NYX_PDF_MALICIOUS and CLAMAV_DETECTION heuristics strongly indicate malicious intent, likely related to phishing or trojan delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://jacksth.ru/wix?keyword=super+mario+sunshine+speedrun+tricks PDF link annotation
    • http://jukojadijomefar.medianewsonline.com/borland_c_builder_6.pdfIn PDF document text
    • http://springwin.space/kotidunojukolakavakakujbwgb.pdfIn PDF document text
    • http://wupuluku.22web.org/pejenevoxajiduxosufolad.pdfIn PDF document text
    • http://mawosatejojeka.sportsontheweb.net/35698864943.pdfIn PDF document text
    • http://sizuxofutitarax.mypressonline.com/fafobizexefupur.pdfIn PDF document text
    • http://dwatches.site/7.3_powerstroke_transmission_cooler0fye4.pdfIn PDF document text
    • http://bigezidara.mypressonline.com/37092349047.pdfIn PDF document text
    • http://tranquils.space/22075839948h8afq.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://7c5e2310-e79b-429e-9f4a-70471a43dcce.filesusr.com/ugd/8ec1ef_c5ad2c8d84764032a5f144d9dd442b40.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/8900f7ba-cc84-4405-83a2-6bfe1b80a730/wavufogowomedata.pdfIn PDF document text
    • https://d4f1f58f-bd44-402a-a4b0-a3aa01e36dbf.filesusr.com/ugd/dffefa_9c32eadf83a54b8cb0baf0d79111cf38.pdf?index=trueIn PDF document text
    • http://bonujuzi.rf.gd/joburu.pdfIn PDF document text
    • https://fed4949e-3809-4fc0-a28b-84c5d390f589.filesusr.com/ugd/94482e_81537d5ee30e47898299b844cd1bee93.pdf?index=trueIn PDF document text
    • https://ddd59a73-be73-4575-bd7b-2e5900175f8b.filesusr.com/ugd/5dc0ef_ba2ad62f14b245f3b3498aaddb2b0769.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/a06365e5-67d9-4ac8-b906-904e64771d95/2020_ford_mustang_gt_700_horsepower_blp.pdfIn PDF document text
    • http://jujageritoxo.atwebpages.com/cch_chuyn_t_dng_nh_sang_word.pdfIn PDF document text
    • https://9b704b87-3668-414c-a24e-b30400fe0e33.filesusr.com/ugd/51c472_f837544232b0461890b1831387a0d358.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/f054af54-6ec3-4653-99b4-4bd3904253d8/bojimevegetosimotimimuket.pdfIn PDF document text
    • 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fa7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA7C 5448 bytes
SHA-256: 2db23486457dea2aacc27b7bc59d89d8cb3095377e4316a42377a0758b0b69db
font_01_sfnt_off00010cd1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CD1 12224 bytes
SHA-256: db9b5b582dd2a91533679edd946297391360053b75bc3ba1e0d15e44d1d0eb4a

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