Malicious PDF — malware analysis report

Static analysis result for SHA-256 815aca2f103953c1…

MALICIOUS

PDF

75.5 KB Created: 2020-11-29 10:16:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: f2d0b70de1f16bcd3d8feb1d35168235 SHA-1: 9c3dfee6ad1100a737ac21222698ca2cb231aae3 SHA-256: 815aca2f103953c1c22a0fdb4f480cc367bec991b7dcfeb4e79667fdaff705ba
274 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file exhibits multiple critical heuristic firings indicating malicious intent, including brand-impersonation credential phishing and redirection to known malicious infrastructure. The embedded links, such as 'https://ggtraff.ru/aws?utm_term=better+than+us+parents+guide+netflix', are designed to lure users to potentially harmful sites. The presence of numerous external PDF links suggests a link farm or SEO manipulation tactic to distribute malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://nogulumu.weebly.com/uploads/1/3/4/4/134476008/2687773.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://ggtraff.ru/aws?utm_term=better+than+us+parents+guide+netflix In PDF document text
    • https://cdn-cms.f-static.net/uploads/4365570/normal_5fa8ead57d3e2.pdfIn PDF document text
    • https://nogulumu.weebly.com/uploads/1/3/4/4/134476008/2687773.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418781/normal_5f9d3bbfc2af0.pdfIn PDF document text
    • https://sixifemawo.weebly.com/uploads/1/3/4/4/134470876/649307.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370996/normal_5fb374804b631.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4428335/normal_5f9a12567258f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387701/normal_5f8ce454a593f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365591/normal_5f8b4ab150f69.pdfIn PDF document text
    • https://gojodisob.weebly.com/uploads/1/3/4/6/134664442/zimiwuzamatutub-konugojakasalib-lovozizolilasu.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://uploads.strikinglycdn.com/files/ebc7c7c7-728e-4df5-a1e1-70dbe2175a4a/pomisaluposikebulezijirux.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2571b56f-dce7-4d95-a42f-a14c7fd18905/39847596017.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a89cbc70-b1d1-46cd-b9ee-77474ea62de1/wegasudokutinof.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/853eb201-e4d3-40c7-8c93-d482bea195a7/xosop.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/75e360ae-79c9-4b0a-837d-4d97c03c0527/android_hacking.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000db8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB8A 5192 bytes
SHA-256: b2a6365f68d362f3f5c7c8bf0629e1631dbda453034365df93aa485ea1a26989
font_01_sfnt_off0000ed32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED32 10968 bytes
SHA-256: f49e240ab33c2dff857c17993762fdf445e00852da1596096d08353e70194a01
font_02_sfnt_off0001129c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1129C 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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