Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ca6a07e6f0e31fa…

MALICIOUS

PDF

77.4 KB Created: 2021-03-27 21:52:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f850f1e46f3517a1568531acae3579b0 SHA-1: 72b01dc7c9045eb09507306f62c650f65255acf5 SHA-256: 0ca6a07e6f0e31fa6e1aeb2d299cdea596866f49d4b79de7a3ea41430c970227
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are SEO-optimized to appear as search results for popular applications. The primary URL, 'https://zajinet.ru/wix?keyword=the+arcana+apk+ios', suggests a lure for users seeking application downloads. ClamAV and ML classifiers strongly indicate malicious intent, likely for phishing or malware distribution.

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://zajinet.ru/wix?keyword=the+arcana+apk+ios
    • https://rakevuxex.weebly.com/uploads/1/3/4/0/134040666/jarazeki-dosojixa-folazawox-rufemubamat.pdf
    • https://jakineporop.weebly.com/uploads/1/3/5/3/135302356/giwoxesowenepu.pdf
    • http://jepisafidezegun.scienceontheweb.net/keurig_model_b40_filter_replacement.pdf
    • http://relodifalixogo.scienceontheweb.net/algebra_formulas_cheat_sheet.pdf
    • https://tidurikax.weebly.com/uploads/1/3/1/8/131856133/puvegatugadituxesib.pdf
    • http://wivevadevenumet.mywebcommunity.org/belzonis_travels.pdf
    • https://gadiziwit.weebly.com/uploads/1/3/1/4/131406086/d511ac3253.pdf
    • http://dofujifeluradep.medianewsonline.com/95468777898.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://13a7c488-548c-4b48-b567-d2b0b9a3e1de.filesusr.com/ugd/85d67f_97528c907ea44c8a81470d5eeacf2c24.pdf?index=true
    • https://s3.amazonaws.com/falufusu/brawl_stars_apk_hile_indir_cretsiz.pdf
    • http://pajupevezujugut.atwebpages.com/96365934742.pdf
    • https://s3.amazonaws.com/zidenigad/zufosexil.pdf
    • https://f62823ea-e863-4eb7-bd7c-e3bac0139ff1.filesusr.com/ugd/8c639a_700176b2e11b437aac820b2ef1f5362f.pdf?index=true
    • https://s3.amazonaws.com/lewuli/kemutowog.pdf
    • https://s3.amazonaws.com/suzujewa/febapuxuziro.pdf
    • https://37523d11-79cf-4eb3-ada4-f05de57c71ee.filesusr.com/ugd/275374_f6da9eead6b44301a03da60dbf5aae35.pdf?index=true
    • https://s3.amazonaws.com/daniwodug/how_much_is_the_101_bus.pdf
    • https://0d3c4653-ec4b-4b04-9c20-59e348ba858e.filesusr.com/ugd/62200f_c292562669a040fbabc7eeea4b81a4ee.pdf?index=true
    • https://s3.amazonaws.com/bezorito/guitar_metronome_app_free.pdf
    • https://d6b7b3c7-8429-4d82-9d75-5d5d09e763cc.filesusr.com/ugd/a8c229_84bffdae20a947a5986c45a84c3bbafd.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_off0000f058.bin
64d178e6d25ed5bf3a6f841935813e95bd2feff0529e6a696894e678350e31b6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF058 5000 bytes
font_01_sfnt_off00010154.bin
96553a21f11004435d3c65b45f4637b5d9611af2d3949350e028a462ef55054b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10154 11692 bytes

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