Malicious PDF — malware analysis report

Static analysis result for SHA-256 5805e0fb86e7a282…

MALICIOUS

PDF

102.8 KB Created: 2021-04-28 23:30:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: cb4fac93b40d1bedbd49dd2c2d75bf77 SHA-1: e22f3a372f8b6885ca619e58dbbc6e049794dfd0 SHA-256: 5805e0fb86e7a282361ed75eeca477496b20dee6942df8bf54592102883cfdc9
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, pointing to various PDF files. One of the primary URLs, https://resalured.ru/strik, appears to be a malicious domain associated with phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or distributing further malicious content via the link farm.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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 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.
  • 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://resalured.ru/strik?utm_term=6+week+pre-season+weight+training+program+soccer+pdf PDF link annotation
    • https://benerema.weebly.com/uploads/1/3/1/4/131408328/wifajutus_kepalojazo.pdfIn PDF document text
    • http://beremoter.online/tufajajarijopu9wk.pdfIn PDF document text
    • http://policyhelpcenter.com/what_is_the_chemical_compound_of_olive_oil1jltb.pdfIn PDF document text
    • https://lirigudufov.weebly.com/uploads/1/3/0/7/130776684/milugufosobutawo.pdfIn PDF document text
    • https://larekupexog.weebly.com/uploads/1/3/4/8/134884129/4603986.pdfIn PDF document text
    • https://cdn.sqhk.co/lajagika/ia9o0gj/rotten_tomatoes_best_comedy_movies_on_netflix.pdfIn PDF document text
    • https://cdn.sqhk.co/jogekiluse/QiaQeQU/pencil_sketch_drawing_girl_with_umbrella.pdfIn PDF document text
    • http://leon-stavki.info/do_powerline_adapters_work_with_power_stripsa0aer.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://s3.amazonaws.com/jiwisigetizoxif/54286589785.pdfIn PDF document text
    • https://87b84290-c0b3-4c73-97a1-3d59c64c3f69.filesusr.com/ugd/c638b7_6806a93bb5bb4ed88f12f39a400f38f6.pdf?index=trueIn PDF document text
    • https://87d5e434-dc39-4d64-8681-877d64e204d5.filesusr.com/ugd/5660ac_9f8cae7cf8e04ae3a1e399ca58547830.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wujixus/transgender_studies_reader.pdfIn PDF document text
    • https://s3.amazonaws.com/vavebufevodutob/48679031951.pdfIn PDF document text
    • https://88749095-6fd7-453f-8e8a-15b48fe47dd1.filesusr.com/ugd/e4d7df_e638beb0285746dc9666b6e369faac2c.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/vuliwisuwig/30291066285.pdfIn PDF document text
    • https://s3.amazonaws.com/dibedamoka/english_vocabulary_exam_with_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/zonivezada/baleravuzivug.pdfIn PDF document text
    • https://s3.amazonaws.com/sojenozap/tojurufarezupopazama.pdfIn PDF document text
    • https://234d5d8d-19c9-4cab-a884-dd0775662658.filesusr.com/ugd/fb7225_92c4785b160b483f8d8c292e7022db70.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/kibavutibeved/52729295643.pdfIn PDF document text
    • https://c931c956-7f53-4e4e-96dc-27d7f003ba63.filesusr.com/ugd/b80c10_d6812e0483644b4297cd14f05a0a826e.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00014398.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14398 5572 bytes
SHA-256: 1832f71b4bedc77ecb235f2a2c6be1550d626dcaecf12811b23ccdc1817bd960
font_01_sfnt_off0001566d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1566D 12116 bytes
SHA-256: 2b1445447796ea6854dc92ade70e88e327421efd5130d64e7cd450a1467cee57
font_02_sfnt_off00017f8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17F8B 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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