Malicious PDF — malware analysis report

Static analysis result for SHA-256 c854d1ed97058fda…

MALICIOUS

PDF

67.4 KB Created: 2020-11-27 20:53:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 7550cdf6e09f9ec69bc28ff04bf1c3e4 SHA-1: 19dd876ab5c3faddcb382d0a0de22bb36eb26d38 SHA-256: c854d1ed97058fda6af14e61156566df97ace1758247183960adb399a734deca
214 Risk Score

Malware Insights

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

The PDF was flagged by multiple heuristics as malicious, including a redirector link and a link farm. The embedded URLs suggest an attempt to drive traffic to external sites, likely for SEO manipulation or to host phishing content. The ML classifier also strongly indicated maliciousness.

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
  • 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.
  • 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/123?utm_term=water+resources+water+loss+drop+by+drop In PDF document text
    • https://pozanabuloga.weebly.com/uploads/1/3/4/3/134366917/filuzewosukop_kadigis.pdfIn PDF document text
    • https://kadukutinebi.weebly.com/uploads/1/3/4/7/134747046/d0027ce3a.pdfIn PDF document text
    • https://geguguxe.weebly.com/uploads/1/3/4/5/134513061/ee900.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • https://uploads.strikinglycdn.com/files/59ddd65f-0b55-4916-880d-71cc25c200af/vutusajafepos.pdfIn PDF document text
    • https://s3.amazonaws.com/sodoxi/wild_ginseng_root_prices_2020.pdfIn PDF document text
    • https://s3.amazonaws.com/pevuwarobuvowa/40997108093.pdfIn PDF document text
    • https://s3.amazonaws.com/bomifabipi/nawawuvonekitowo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0129a4a4-83f3-46e4-81ad-4e69d63db570/15314030948.pdfIn PDF document text
    • https://s3.amazonaws.com/ganubifirigevi/lowowapokifu.pdfIn PDF document text
    • https://s3.amazonaws.com/jirebonudur/anime_fighting_jam_wing_3.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9ec7f4ca-84ca-4dc5-b01c-bb5e5c6279c6/72968832673.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/059d6a15-8a57-44e1-80db-b5843df42110/lubitiwobes.pdfIn PDF document text
    • https://s3.amazonaws.com/fosagoba/83102845423.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/66425eac-4e33-4f6a-8e8a-73af8174cc6e/xikiwedibok.pdfIn PDF document text
    • https://s3.amazonaws.com/felasorarabipis/gevosafalolizesemejisow.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7154265e-4b77-411f-8dd7-d7707d5d7282/jipiditajumujupidati.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://www.gnu.org/licenses/gpl.htmlIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b9b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB9B7 5416 bytes
SHA-256: aa3e67b109e713d249f10c3cd3e945595d6d2803ca3199f03530ceb5e3f112bc
font_01_sfnt_off0000cc3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC3A 6148 bytes
SHA-256: 4910d0177da9f60ecc92c13a34fae8c5c38ffafb9e4e22a3c3fd987548b79157
font_02_sfnt_off0000dc1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC1B 10728 bytes
SHA-256: 98c58cf96e82295c305e64409f04c665722bf9a2e400d9a77a1ed10e270477bc

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