Malicious PDF — malware analysis report

Static analysis result for SHA-256 5585231ab7985e94…

MALICIOUS

PDF

75.9 KB Created: 2020-11-10 20:10:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: a0f99b2f2de36288fe2ed4746d45b078 SHA-1: 9b6c15bd40efdcba2ea510192b6c262c78c182d0 SHA-256: 5585231ab7985e94ea348a3c4f1e77df312b0f9c8cef4913b2b3210950a34156
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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://trafffe.ru/strik?keyword=vixia+hf+r400+usb+port+manual PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4387050/normal_5f8dd1c4a5be3.pdfIn PDF document text
    • https://pojutawetuje.weebly.com/uploads/1/3/1/3/131382470/4623168.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473388/normal_5fa4684bee656.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425916/normal_5f9e6c2530aa7.pdfIn PDF document text
    • https://suludizivot.weebly.com/uploads/1/3/1/3/131383823/2505982.pdfIn PDF document text
    • https://fisalusul.weebly.com/uploads/1/3/4/3/134341538/nurizitiduwux.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374847/normal_5f8d4ea3d226f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371025/normal_5f8f542fa930c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/f2f7084b-efb6-4619-8f21-e971e7081ba3/37868949103.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6580ea6c-f308-4bad-973e-c51baef61ae5/art_study_guide_chapter_4.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c263ec9e-f33a-4f33-89bd-8096df90c63a/ventajas_y_desventajas_del_switch.pdfIn PDF document text
    • https://s3.amazonaws.com/zuxadol/download_arabic_english_dictionary.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a509dc01-329c-4238-9b0a-f87ea8252a6b/coreldraw_full_crack_kuyhaa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f287f997-5b4d-42be-abd1-1b906003375f/carnation_baby_formula_good_start.pdfIn PDF document text
    • https://s3.amazonaws.com/kozibowisenatu/tyrones_unblocked_games_papas_pancake.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e8b51e2b-f231-454c-af43-628e0ab5f5d9/boy_in_the_striped_pajamas_author.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_off0000ec4e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC4E 5544 bytes
SHA-256: 606d5ac5d56758b51bcb91f467d42000dc665c3c9a4eeb48c4b013afbc5d6b83
font_01_sfnt_off0000ff06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF06 10436 bytes
SHA-256: eb190550c948599520e387a2caf77cb99494c7b72a580dea81e78833a71995e0

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