Malicious PDF — malware analysis report

Static analysis result for SHA-256 1444c6eed2590eda…

MALICIOUS

PDF

72.0 KB Created: 2020-12-09 01:48:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: d4f2efca25b72395818ecf58c7598353 SHA-1: d065827db5aed337924885b8c048c6d035f64edd SHA-256: 1444c6eed2590eda91aeb0d4fa722ac76fd595af3937d9dddad05bdc16746b25
214 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://cctraff.ru/strik?utm_term=hillview+middle+school+palmdale'. Additionally, another critical heuristic indicates this PDF is part of a link farm, with numerous external PDF links. The ML classifier also strongly flagged this PDF as malicious. These indicators suggest a phishing or malware distribution attempt.

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://cctraff.ru/strik?utm_term=hillview+middle+school+palmdale In PDF document text
    • https://nomiviweran.weebly.com/uploads/1/3/1/0/131070579/xabupenexegezew.pdfIn PDF document text
    • https://zimiduninu.weebly.com/uploads/1/3/1/6/131637103/pikakogeluwuxopubek.pdfIn PDF document text
    • https://worowisirokisid.weebly.com/uploads/1/3/4/8/134856274/lulorodevagajoriz.pdfIn PDF document text
    • https://fategebedabeno.weebly.com/uploads/1/3/4/7/134718848/sokurinom.pdfIn PDF document text
    • https://litaxavuve.weebly.com/uploads/1/3/4/8/134848922/jopum-wusuj-todoparowak-mazulorajadaju.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc0e92a0a2757459be2ed0b/t/5fcd80e3260a660a6bf22a7e/1607303395883/real_gang_crime_gangster_city.pdfIn PDF document text
    • https://s3.amazonaws.com/wupagivoz/omm_kamleika_race_jacket_size_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/xixonu/31256394316.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0df209955c744b53b696b/t/5fc1634b2dd96f5918236471/1606509388588/91970977736.pdfIn PDF document text
    • https://s3.amazonaws.com/tokafanawa/mokimi.pdfIn PDF document text
    • https://s3.amazonaws.com/susopuzupure/gastrostomy_tube_care.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc17cd088c99b6d37ab4e26/t/5fcea852c9e09802402591b0/1607379026376/25574317358.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc132d08787e879896ded78/t/5fc6df2ba038a451bcdcd49d/1606868780913/bingo_wings_arm_fat.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c938.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC938 5332 bytes
SHA-256: 2f09de96e3ba019c521677e68af65b71d0affe8984d429c5499757a4b2071749
font_01_sfnt_off0000db4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB4A 10040 bytes
SHA-256: 2449b1a145a62d6dbe8829c40c86bf0be9e090103f9cd6edf6ca5accdd95c946
font_02_sfnt_off0000fdd5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDD5 16204 bytes
SHA-256: 532315dfdc59b350d447ad91845dd8cc72a836e684f536ab9a4305dc5b53fb8e

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