Malicious PDF — malware analysis report

Static analysis result for SHA-256 0963be1a0f955384…

MALICIOUS

PDF

72.1 KB Created: 2020-12-16 03:47:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 90e59226184b6d410d7726aa1e95334b SHA-1: e0f9c4506ce630ab92073b1dd86e2958bc85c599 SHA-256: 0963be1a0f955384114a3fd6d4f4828cd09cdeff90ea9f351cb3a741b38cea4b
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains numerous external links, many pointing to Weebly-hosted PDFs, suggesting a link farm or redirection mechanism. The presence of a critical heuristic firing for PDF_SEO_LINK_FARM and ClamAV detection as Pdf.Phishing.Trojan indicates malicious intent. The embedded URLs likely serve as lures to phishing sites or malware downloaders.

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://traffset.ru/strik?utm_term=shutter+island+download PDF link annotation
    • https://bobixazila.weebly.com/uploads/1/3/4/5/134599816/timasuf.pdfIn PDF document text
    • https://tototatinup.weebly.com/uploads/1/3/4/3/134332383/zuzanemekuv-samusupiw-lemuzatafenat-pufikafoxusi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386073/normal_5fb88ad2090a7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413362/normal_5fbcbce76f012.pdfIn PDF document text
    • https://sazujusa.weebly.com/uploads/1/3/4/6/134632778/38ed3bf62c.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://static1.squarespace.com/static/5fcdfcfaecb86110b1356bd8/t/5fd642a8ab777271768a8013/1607877289604/15406852052.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc592c8239b07229150fbb5/t/5fca4528ec1d586fb3992a79/1607091500577/playgo_toys_little_engineer.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc080f7bf71053ccb0e3c67/t/5fc3d37b3f75b16643492ff9/1606669180580/83712536885.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc6b8cf03f04e270fdfac23/t/5fcf62981a78ee5f0166503d/1607426713827/moto_mechanic_simulator_apk.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc29af4e9fc3622d52d06da/t/5fcc6b5f8a55f2188b6f38a9/1607232351678/71778651506.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0bc293dfdd95b60d440d6/t/5fc2ac36f3de5e49b5bc0e35/1606593590687/convert_300_grams_to_oz.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0dbca2e537a05ef08df7c/t/5fc15416fa04221c71512676/1606505501308/real_racing_3_hacks_android.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc2fb2a40f1034a5cb68ea9/t/5fcf2aab505b451de18753a5/1607412399083/nike_sports_bra_non_padded.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_off0000cde9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDE9 4992 bytes
SHA-256: 6145cefbe14b965f7b0be8f8d11e010aa13380ff7ae3357aa53c6dedec15c8a1
font_01_sfnt_off0000ded9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDED9 11364 bytes
SHA-256: 4187260f8194e74a1fcfccc0954be8879542e5c8872d49b8792b44445f216394
font_02_sfnt_off0001059f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1059F 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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