Malicious PDF — malware analysis report

Static analysis result for SHA-256 fcefc586524216db…

MALICIOUS

PDF

81.4 KB Created: 2021-03-11 21:09:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: 06b98b474f0ef512a520a7756b91bc68 SHA-1: 6262b5d1fce2a46144bfe30762aa710b3fe96866 SHA-256: fcefc586524216dbfa7b1b250377e320c2b61ec1a10eed75ad5b87212217656b
214 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to known malicious redirectors or are part of a link farm designed to manipulate search engine results. The document body, though heavily obfuscated, contains text related to "Boiling water reactor working pdf" which appears to be a lure. The presence of ClamAV and ML heuristic firings further supports its malicious classification, likely as a phishing or redirection campaign.

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://dafemum.ru/123?utm_term=boiling+water+reactor+working+pdf In PDF document text
    • https://menanotiji.weebly.com/uploads/1/3/4/3/134322389/fofokob-kalozetuvodup-venojamemokis-lepezo.pdfIn PDF document text
    • http://neo-tp.ru/231238552392eic8.pdfIn PDF document text
    • http://usesoda.pro/rufinodaxagidiruwukroiq.pdfIn PDF document text
    • https://cdn.sqhk.co/numavagoko/3hhgf5M/dr_davey_dentist_grayling_mi.pdfIn PDF document text
    • http://whitecheat.xyz/puzzles_and_dragons_tier_listcq623.pdfIn PDF document text
    • https://kidodizaramaba.weebly.com/uploads/1/3/4/0/134096495/kuzut-renifir-zizogux-zejaku.pdfIn PDF document text
    • https://cdn.sqhk.co/wodelaganav/lHthjih/34970194916.pdfIn PDF document text
    • http://gprofights.ru/xofawifezgg91.pdfIn PDF document text
    • https://cdn.sqhk.co/tivanosox/dhigjbw/forgotten_tales_bandit_tower_key.pdfIn PDF document text
    • https://dopovubejaxow.weebly.com/uploads/1/3/4/0/134017692/8249889.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://3f5765b5-411c-4b28-96d1-a1e3b219bcee.filesusr.com/ugd/ca847e_efe5f0b82d694f2b965a82669fe4559e.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/lemerisinivum/ableism_definition.pdfIn PDF document text
    • https://b0c090b1-cb02-46d8-8a69-3fb9d82636b6.filesusr.com/ugd/4dbf3f_a5fb2960e7f74c4aae64d34a9da35da2.pdf?index=trueIn PDF document text
    • https://8c17aa34-c454-4d6c-a218-8929c845e329.filesusr.com/ugd/808cd0_e86b80dbd29b4454b39a0355b2a8ff96.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/kokesatodixon/katar.pdfIn PDF document text
    • https://s3.amazonaws.com/dakebesuvum/fevivukajaxo.pdfIn PDF document text
    • https://s3.amazonaws.com/wobuzisibal/73037064355.pdfIn PDF document text
    • https://1527c8d3-3321-4e9f-872f-e2bebb57bac2.filesusr.com/ugd/bf2d42_96f3521e75a140f39795c42bf615a6c9.pdf?index=trueIn PDF document text
    • https://d8ec88ce-93b1-4b83-b294-7016fd5b5063.filesusr.com/ugd/366252_65a329f6404c42299152ed28fa944966.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jarawaxanivu/android_10_custom_rom.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_off0000ffa4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFA4 5352 bytes
SHA-256: 851a653a4bb7c33784971f51e1ae6bd2383556ad11c49d80027968832a4381d1
font_01_sfnt_off00011206.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11206 11280 bytes
SHA-256: 117b894610a38a69c3c26e437d67d0e495149927575f8c2df0f8910b674ddf38

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