Malicious PDF — malware analysis report

Static analysis result for SHA-256 23154d09cccb76c7…

MALICIOUS

PDF

42.2 KB Created: 2020-10-02 07:13:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 6c0b7e9c4205bbea8318fc626af50447 SHA-1: 7fa033d5b31a9d6e9f43c4825d27d812b421b41d SHA-256: 23154d09cccb76c761a81fb6ddf823a7d0f8812d3b03ebc6c457583bda24bca1
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a large number of embedded links, many of which point to potentially malicious redirectors or SEO link farms. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' specifically flags a URL leading to known malicious infrastructure. This suggests the document's primary purpose is to redirect users to harmful sites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://cctraff.ru/strik?keyword=uji+alkalinitas+gelas+pdf In PDF document text
    • http://zezewa.elmrealestateanddesign.com/uploads/1/3/1/3/131383510/1896834.pdfIn PDF document text
    • http://zorabapax.jeannecorrigal.com/uploads/1/3/1/3/131380480/9716502f4.pdfIn PDF document text
    • http://disek.uluwatustudio.com/uploads/1/3/1/0/131070374/neraseliwudeb-lipaxikane.pdfIn PDF document text
    • http://files.essentialoilsexpress.com/uploads/1/3/0/8/130874246/bifekasajobaparefo.pdfIn PDF document text
    • http://files.jaworblueberries.com/uploads/1/3/0/8/130814594/a7fe338b6a417.pdfIn PDF document text
    • http://tikus.gravattjewellery.com/uploads/1/3/0/9/130969723/c6adb04.pdfIn PDF document text
    • http://zikama.liquidarmor.eu/uploads/1/3/1/1/131164250/sunogubovanoji.pdfIn PDF document text
    • http://files.swyaausa.org/uploads/1/3/0/7/130775772/55c67adade951.pdfIn PDF document text
    • http://pozurab.emeraldacresaldergrovebc.com/uploads/1/3/1/8/131856772/jupemojib-figovudizag-koronakirel.pdfIn PDF document text
    • http://files.obviousvolcano.com/uploads/1/3/1/4/131438211/fixusine.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1327/5811/files/how_to_trigger_a_winter_mystery_stardew_valley.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/5745/8593/files/the_gold_bug_and_other_tales.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/8279/6193/files/medical_record_filing.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/8577/8084/files/dicribe_the_sun.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fbc6e40e-1036-42d6-8a2c-125eb988270b/gagatobosisivexawolo.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_off000066b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x66B4 5244 bytes
SHA-256: 0ef4086f75d10952d2486dba69f960f96eb66dc1c2d5efa5607aa35cb45665e9
font_01_sfnt_off000078af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x78AF 10420 bytes
SHA-256: d7d5ff689e435272a8a39970541c735d00143284135e7463ac0595a6566cfad6

Open this report in the interactive analyzer, or submit your own file for analysis.