Malicious PDF — malware analysis report

Static analysis result for SHA-256 782e69879b78b05e…

MALICIOUS

PDF

83.5 KB Created: 2021-05-18 21:15:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 7ef055ebc336efe9d1c79d361733cfcf SHA-1: 73eb01c2dd4425d4126b53178961155ca97c89a5 SHA-256: 782e69879b78b05ea00fe1dc8eaa55b1a1432eb3a277306a1301937cc22bf269
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to Weebly-hosted PDFs, suggesting a link farm or SEO manipulation tactic. The ClamAV detection and ML classifier strongly indicate maliciousness, likely related to phishing or a trojan. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of malicious intent to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9957

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://maypoin.ru/strik?utm_term=how+to+use+first+response+pregnancy+test PDF link annotation
    • https://zuvubexusemeto.weebly.com/uploads/1/3/4/3/134373725/bad59fc93e53b8.pdfIn PDF document text
    • https://gubagomokugexat.weebly.com/uploads/1/3/3/9/133988684/jodexo.pdfIn PDF document text
    • http://sufewonu.iblogger.org/39532634098.pdfIn PDF document text
    • https://mipolokipum.weebly.com/uploads/1/3/5/3/135399848/6994768.pdfIn PDF document text
    • http://taribada.22web.org/zufuw.pdfIn PDF document text
    • https://natozimokuwepef.weebly.com/uploads/1/3/4/3/134398015/6527141.pdfIn PDF document text
    • https://nazesamujev.weebly.com/uploads/1/3/1/3/131397942/8475443.pdfIn PDF document text
    • https://vewekazetuxif.weebly.com/uploads/1/3/1/3/131379326/27e93041d8a00.pdfIn PDF document text
    • http://xukewatamom.22web.org/87481175791.pdfIn PDF document text
    • https://rezivunafotete.weebly.com/uploads/1/3/4/3/134354631/fa9956de7c.pdfIn PDF document text
    • https://tunuzari.weebly.com/uploads/1/3/4/3/134316111/9555117.pdfIn PDF document text
    • https://rikafikisejale.weebly.com/uploads/1/3/0/7/130740062/9876714.pdfIn PDF document text
    • https://fejegexe.weebly.com/uploads/1/3/4/6/134617501/7454098.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/xapidajovaji/cha_cha_dance_performance.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7e2a9384-00ec-4e70-b165-5cf4d4b6e639/30151766641.pdfIn PDF document text
    • https://s3.amazonaws.com/zozuxukoxo/iso_interested_parties_template.pdfIn PDF document text
    • http://badunedotefewep.rf.gd/chicano_rap_oldies_vol_2_free.pdfIn PDF document text
    • http://fobiwuna.epizy.com/65008867022.pdfIn PDF document text
    • https://s3.amazonaws.com/vonusirukete/whirlpool_washing_machine_error_codes_f5_e3.pdfIn PDF document text
    • https://s3.amazonaws.com/ruzumeb/98757934320.pdfIn PDF document text
    • https://s3.amazonaws.com/fikuvine/zigepasexoguvum.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cbc449d3-d550-4f45-a5ac-2f61b3e01a95/14243265906.pdfIn PDF document text
    • https://s3.amazonaws.com/tedowafomaru/themathworksheetsite_answer_key.pdfIn PDF document text
    • https://s3.amazonaws.com/jasadavebaga/bruchrechnen_arbeitsbltter_5_klasse.pdfIn PDF document text
    • https://s3.amazonaws.com/neviwove/51210211099.pdfIn PDF document text
    • https://s3.amazonaws.com/betefowubevat/charlie_and_the_chocolate_factory_streaming_sub_ita.pdfIn PDF document text
    • https://s3.amazonaws.com/baxegezivumi/how_to_subpoena_bank_records_for_child_support.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_off000109d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109D0 5304 bytes
SHA-256: 8dcadf58bb43c2b226b9cd125839a9e453552ec1c026bd67e36f45c38fa30ca4
font_01_sfnt_off00011c09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C09 10376 bytes
SHA-256: fe0daaf6df91aba0b9b18448aa8a93588b6228c9f945ef367aef1252179206c7

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