Malicious PDF — malware analysis report

Static analysis result for SHA-256 7cb2d1837fe47074…

MALICIOUS

PDF

67.1 KB Created: 2021-02-21 13:00:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: bd29b9384492db96a84e3221ac66f6a2 SHA-1: 08ae24eb8435c89b17bd14e18099d8e79b9cbd17 SHA-256: 7cb2d1837fe47074487a29f4d29507d312fce65333be5c7dbb71aa132c1ae15b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF file contains a large number of external links, many of which are hosted on suspicious domains or are designed to appear as SEO content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded URI heuristics suggest it's designed to redirect users to malicious sites.

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 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://baarspo.ru/wix?keyword=boxhead+more+rooms PDF link annotation
    • https://letunaxure.weebly.com/uploads/1/3/1/3/131383761/roxiwizeg.pdfIn PDF document text
    • https://mojoranazo.weebly.com/uploads/1/3/4/4/134403481/3b939.pdfIn PDF document text
    • https://reropazorulofo.weebly.com/uploads/1/3/4/4/134437501/88dfb12.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368219/normal_600d95837c09d.pdfIn PDF document text
    • https://jekomijijupuda.weebly.com/uploads/1/3/1/4/131438685/5687389.pdfIn PDF document text
    • https://jubewujug.weebly.com/uploads/1/3/4/6/134653216/gazukunebasi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448538/normal_5fdc75ce14e6a.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/wemazun/78218355058.pdfIn PDF document text
    • https://s3.amazonaws.com/lixuduwonifa/kasofiwudafasozofoluf.pdfIn PDF document text
    • http://mudotepejix.epizy.com/how_to_fix_craftsman_1_2_hp_garage_door_opener.pdfIn PDF document text
    • https://s3.amazonaws.com/tawovojo/11946298237.pdfIn PDF document text
    • https://s3.amazonaws.com/nabifovu/5308326944.pdfIn PDF document text
    • http://vamivesuger.epizy.com/fewigo.pdfIn PDF document text
    • http://sijurajogo.epizy.com/35182098186.pdfIn PDF document text
    • https://s3.amazonaws.com/jezaxojipevu/jejuwugukimuk.pdfIn PDF document text
    • https://s3.amazonaws.com/kefiperizonofu/sigavup.pdfIn PDF document text
    • http://refufigatuzar.epizy.com/excel_vba_format_cell_value_as_text.pdfIn PDF document text
    • https://s3.amazonaws.com/nitizobuv/soxubexonefitajutu.pdfIn PDF document text
    • https://s3.amazonaws.com/minabiwa/20478136901.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_off0000cb71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB71 5148 bytes
SHA-256: 5374828d1f03a67edcf54b0c482a97fb25d6233439c7ce0d5481205b26d8ffd3
font_01_sfnt_off0000dcca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCCA 10236 bytes
SHA-256: 1a351d924246601b0d264ab466ab871d81fcfab46be0e9bf705f268ba7ef404e

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