Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f1d019b680ef24a…

MALICIOUS

PDF

75.4 KB Created: 2021-03-15 17:11:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 75036188f9b3f98aa40611dee83a3e70 SHA-1: 11831237f70a137984651cb27df666e6c0b1a44c SHA-256: 0f1d019b680ef24a63ef8ae007f05a6e2b7860f58c9a96bfde93874fe4677d2e
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan' and an ML classifier indicating maliciousness. The PDF contains a large number of external links, suggesting it functions as a link farm designed to redirect users to malicious websites. The presence of these links and the overall detection profile strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://jumiwimov.ru/123?utm_term=south+movie+picture+ing+full+hd
    • https://nugumogixowujo.weebly.com/uploads/1/3/1/4/131437940/gepaditinawubotiruzi.pdf
    • https://zovipimisog.weebly.com/uploads/1/3/1/1/131163747/fagipevuligij.pdf
    • https://cdn.sqhk.co/kapudome/QhbIghR/kinegogexepox.pdf
    • https://cdn.sqhk.co/mekurapiw/rGghbgg/alien_shooter_2_game_cheats.pdf
    • https://cdn.sqhk.co/vikafaselida/jdt0Hii/wafegegosamiv.pdf
    • http://rejemezurufoveg.mywebcommunity.org/77707581294.pdf
    • https://cdn.sqhk.co/bonagoxe/VHA9gcY/migojofututotat.pdf
    • http://suporefebakibur.mygamesonline.org/hp_laserjet_1012_not_printing_windows_10.pdf
    • https://ferofetilusef.weebly.com/uploads/1/3/5/3/135346026/tosutizexipud_litix.pdf
    • http://bosilubag.22web.org/rutukigege.pdf
    • https://rofozewoguse.weebly.com/uploads/1/3/1/3/131384025/2728165.pdf
    • http://dufifudusimube.mygamesonline.org/xewewipela.pdf
    • https://pugotaba.weebly.com/uploads/1/3/5/3/135302821/wuzaxut-sajutawixusage.pdf
    • http://melowew.scienceontheweb.net/64300966865.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://romakilax.myartsonline.com/geotechnical_engineering_jobs.pdf
    • https://8a7e94d2-1b07-4399-8a7b-cfebf1eb419e.filesusr.com/ugd/e78b77_705e1e8a0b3e4f899979a67adefe2fad.pdf?index=true
    • https://f770b3d7-c897-40e0-9323-5ad0abd91552.filesusr.com/ugd/1fa6dd_ad55a1bc10c14e3c90c3a82978ba4e7d.pdf?index=true
    • http://jodonurinifos.epizy.com/42448077459.pdf
    • https://f238abdf-92e3-4651-90df-65b6e8a648d9.filesusr.com/ugd/99965f_e9080340cb6941d4bee23e3a0c24db95.pdf?index=true
    • http://xabudavadeguvo.myartsonline.com/what_is_the_hardest_prison_in_uk.pdf
    • https://c2093f15-f4fb-4bda-9582-db5404103fa6.filesusr.com/ugd/b28561_416094ccc6664221b54c7ab8cc45fe66.pdf?index=true
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e949.bin
52b96a7ad92f8a676e3ae2c10f3b533d5fa8f264bfdad6e51413e6aaffad943a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE949 5344 bytes
font_01_sfnt_off0000fb5e.bin
c7fe8dddec52d57bbafe33be559a9f6e1b12c6f051b681b29972e9dc0b4db1dd		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFB5E 10956 bytes

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