Malicious PDF — malware analysis report

Static analysis result for SHA-256 792e85a24d11275b…

MALICIOUS

PDF

76.9 KB Created: 2021-01-12 19:36:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 8cad71b660fb64f43177c799ddc8875a SHA-1: 41a07c0ec28461fb5b4139281bb2f0f8e8cde1a9 SHA-256: 792e85a24d11275b2b97c9593ae5f807a06837e7a422f8d68f4751abd75a8cb2
274 Risk Score

Malware Insights

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

The PDF contains a link farm and impersonates Amazon to phish for credentials. The heuristic 'SE_BRAND_CREDENTIAL_PHISH' directly indicates a credential phishing lure targeting Amazon. The embedded link 'https://rexolofozex.weebly.com/uploads/1/3/4/3/134368018/lulotigubekawaj.pdf' likely serves as the malicious payload or further redirection. The presence of numerous external links suggests an attempt to manipulate search engine results or distribute further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • 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.
  • Brand-impersonation credential phishing lure critical SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: action link to abused redirector https://rexolofozex.weebly.com/uploads/1/3/4/3/134368018/lulotigubekawaj.pdf.
  • 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://gettraff.ru/aws?utm_term=encyclopaedia+eorzea+volume+2 In PDF document text
    • https://static.s123-cdn-static.com/uploads/4461516/normal_5fed3348b7bcf.pdfIn PDF document text
    • https://rexolofozex.weebly.com/uploads/1/3/4/3/134368018/lulotigubekawaj.pdfIn PDF document text
    • https://cdn.sqhk.co/govulasem/hgZWzib/police_officer_killed_in_laredo_texas.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470685/normal_5fa464075a6fb.pdfIn PDF document text
    • https://site-1245460.mozfiles.com/files/1245460/guroperel.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460708/normal_5fa17563a5499.pdfIn PDF document text
    • https://jakinazar.weebly.com/uploads/1/3/1/0/131070367/1e728be.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371806/normal_5fb493697a7f2.pdfIn PDF document text
    • https://cdn.sqhk.co/demexadol/ahdheid/5727070592.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/nitirew/92857837322.pdfIn PDF document text
    • https://s3.amazonaws.com/vobuturinivi/66215476389.pdfIn PDF document text
    • https://s3.amazonaws.com/farezelof/wotitinun.pdfIn PDF document text
    • https://s3.amazonaws.com/susopuzupure/77698132513.pdfIn PDF document text
    • https://s3.amazonaws.com/xezonijida/guide_des_champignons_comestibles.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cb23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB23 5144 bytes
SHA-256: b19cd60ef96914006c3ffbad9923106640963dcd4784f8b10053859a599dc978
font_01_sfnt_off0000dc8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC8E 10888 bytes
SHA-256: ff97f09576d85487f2318d8ee2693b93b2870148f0f66b79f33da4ab1b4cae4b
font_02_sfnt_off00010219.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10219 16060 bytes
SHA-256: 8f676b3be356e2086f34f7c81dd3575184be90372cbe0b4aaba7ba30be3377d2
font_03_sfnt_off000116b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116B3 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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