Malicious PDF — malware analysis report

Static analysis result for SHA-256 822bac176bfecd76…

MALICIOUS

PDF

82.2 KB Created: 2021-03-30 04:51:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: b0983dedd7f5d626ab15ef55d0d119b3 SHA-1: b389f54682f66d5fe8f19fed29dec0232df5d556 SHA-256: 822bac176bfecd76c6457e85d09060f96dc0a174cf16fdff8cc61bd82bb4ffad
186 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many hosted on disposable domains, indicating a link farm or phishing lure. The ClamAV detection and ML classifier strongly suggest malicious intent, likely to redirect users to malicious sites or download further payloads. No scripts were extracted, but the structure and URL patterns are indicative of a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://lozipotod.ru/strik?utm_term=life+fitness+x5+elliptical+replacement+console PDF link annotation
    • https://cdn.sqhk.co/pibusupi/ifVhiih/gotap.pdfIn PDF document text
    • https://xeraxoxatetubus.weebly.com/uploads/1/3/5/9/135993523/a38b366e943e68c.pdfIn PDF document text
    • https://gozexorajive.weebly.com/uploads/1/3/4/6/134610068/3e87d0da8b.pdfIn PDF document text
    • http://jizerigozigalav.getenjoyment.net/981423381.pdfIn PDF document text
    • https://cdn.sqhk.co/surodamiz/Ovlgeha/33392042682.pdfIn PDF document text
    • https://rurefidutemajob.weebly.com/uploads/1/3/4/3/134333690/lezotabodekopi_jufagute_tenatotuxinit.pdfIn PDF document text
    • https://cdn.sqhk.co/mumeriretepi/ieP07So/run_android_application_on_mac.pdfIn PDF document text
    • https://nazokorebuvawir.weebly.com/uploads/1/3/0/7/130776058/toxomisalomasenoveb.pdfIn PDF document text
    • https://cdn.sqhk.co/zenegiwowi/hiOOgdD/gcu_math_placement_test_answers.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://0c7ecde5-8d52-4b6d-bf00-bcb9beb5fd3c.filesusr.com/ugd/b6f5a5_cb2c90a8370048e89aa793467dca290c.pdf?index=trueIn PDF document text
    • http://dezinolabebosod.atwebpages.com/fire_resistance_design_manual.pdfIn PDF document text
    • https://7095e710-59ac-4d27-8a5a-f3bbcaf65deb.filesusr.com/ugd/418e76_357865b2153547aeb96da231e86d0ee5.pdf?index=trueIn PDF document text
    • http://vakewexapenox.epizy.com/sage_50_accounting_software_free.pdfIn PDF document text
    • http://xinifaduzinuvu.onlinewebshop.net/18399299998.pdfIn PDF document text
    • https://0f8fedcd-12c0-4678-86f8-e2bff7269121.filesusr.com/ugd/70e7d4_dabd6f2e28504f878df88b7d1f475674.pdf?index=trueIn PDF document text
    • https://97a45c9e-1ab5-462a-bfe2-fded34b9a8b9.filesusr.com/ugd/b50c55_cf8adc0308924887ae635d82fd9d980d.pdf?index=trueIn PDF document text
    • https://238a82c5-85a8-4641-a991-2f0f5270ddc4.filesusr.com/ugd/63f22d_196f82c410c24a58ab66b3b57cee9890.pdf?index=trueIn PDF document text
    • http://tuxebam.rf.gd/tuberculous_lymphadenitis.pdfIn PDF document text
    • https://c8d0f166-86fd-441b-8df5-aa5e6c6c7644.filesusr.com/ugd/f4b3af_de2c959a225d49eea36aebcae84d67e2.pdf?index=trueIn PDF document text
    • http://petefedugekuk.rf.gd/adele_songbook.pdfIn PDF document text
    • http://ripajadiw.rf.gd/what_is_a_good_macro_ratio_to_lose_weight.pdfIn PDF document text
    • http://tebuvarajeba.epizy.com/zilopakaba.pdfIn PDF document text
    • https://9334512a-4df1-45dc-8804-f0fa1d9e2a3d.filesusr.com/ugd/9466eb_6a56d4be013f48488161b1e615d7e666.pdf?index=trueIn 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eacc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEACC 5084 bytes
SHA-256: 592eb872b54243a24f46101d61d133ea0fa04a1e464093878fb78e39b5c399fa
font_01_sfnt_off0000fbf6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBF6 1800 bytes
SHA-256: e9a5a1f6ed95b1e3669933bb00002ad32a1708c3e0b735191cad5e02368a6c7d
font_02_sfnt_off00010484.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10484 11320 bytes
SHA-256: fa92484d44fc0de9c9111e5f6ee8be5742c0c1047ed6f691707f94afd29ab260
font_03_sfnt_off00012afe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12AFE 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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