Malicious PDF — malware analysis report

Static analysis result for SHA-256 60e23f22cac13636…

MALICIOUS

PDF

106.2 KB Created: 2021-05-26 09:17:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: 04152b2e7d979ce94ad2f1ec8db89da0 SHA-1: 84b61709d3728beaeaacc574166af6df3e6dac55 SHA-256: 60e23f22cac1363625fcce567b9476d92a3fbc01caf11061d4b3a2f854472cf1
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of external links, many of which point to PDF files hosted on services like Weebly and Strikingly. This behavior is indicative of a link farm designed to artificially inflate search engine rankings or distribute malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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://vavujajakakef.weebly.com/uploads/1/3/0/7/130740385/9167905.pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4459055/normal_6027ffa138556.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4444370/normal_5fcb7794d1f8a.pdfIn PDF document text
    • https://bupiwiwokegiju.weebly.com/uploads/1/3/4/5/134598777/2830729.pdfIn PDF document text
    • https://vezaxudikofexi.weebly.com/uploads/1/3/4/6/134654587/00d34206e8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481513/normal_5fddcb6e39353.pdfIn PDF document text
    • https://kefomituwo.weebly.com/uploads/1/3/2/8/132815939/xetunar.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4480187/normal_5fd058393308d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463006/normal_6023460d3b8d0.pdfIn PDF document text
    • http://fontawesome.iohttp://fontawesome.io/license/In 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
    • http://feedproxy.google.com/~r/wb/ENAH/~3/dRGGkpkNhSI/wb?keyword=primeros%20auxilios%20basicos%20slidesharePDF link annotation
    • https://s3.amazonaws.com/kegubinefuda/mtd_20_ton_log_splitter_parts_diagram.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7a5e115e-1a96-48a3-98df-606b31021f97/replacement_heads_for_norelco_aquatec.pdfIn PDF document text
    • https://s3.amazonaws.com/fotepopunaj/fafakobidi.pdfIn PDF document text
    • https://s3.amazonaws.com/tupofelasujewas/fevev.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ab3870ad-569a-4ab4-b905-2ab861427a6a/84192176825.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/32caa16e-9988-4f3f-9535-87b1338508d0/vovinerulufirija.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9321b496-4a93-4a5a-8d97-99dd81ba227b/52676661953.pdfIn PDF document text
    • https://s3.amazonaws.com/siwixomudit/how_to_charge_phone_with_aa_battery.pdfIn PDF document text
    • https://s3.amazonaws.com/zazelujeju/lagisez.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5af596fa-bd06-4aa8-b464-a83c19de97ee/maytag_bravos_quiet_series_300_washer_ol_error_code.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c1065ede-2d9b-48dd-8e86-7054b12e91e9/17165233588.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/478467d3-0857-4595-83e1-98f9db60f09d/60410316137.pdfIn PDF document text
    • https://s3.amazonaws.com/toliwudalamem/nojabobewerenujuxatujir.pdfIn PDF document text
    • https://s3.amazonaws.com/wefemabeni/must_have_see_series_netflix_ireland.pdfIn PDF document text
    • https://s3.amazonaws.com/suxuzubojut/although_despite_rephrasing.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000147a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x147A8 1724 bytes
SHA-256: aef8a534dec84de95ff372006b4ea60bbdf4c46ac450e4e69f05211c06567c8b
font_01_sfnt_off00015044.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15044 5084 bytes
SHA-256: a5f1adeb69aee5162c98c276faa1f83aaf82bf3d854fa1e46c495e36e57d0f23
font_02_sfnt_off0001617e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1617E 12872 bytes
SHA-256: 56ae57fcb599e12857c8981aef97867fd41c0584c2fb39bfbe14fcd040277af9
font_03_sfnt_off00018ac4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18AC4 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3