Malicious PDF — malware analysis report

Static analysis result for SHA-256 357bf6b63a132d92…

MALICIOUS

PDF

79.0 KB Created: 2021-01-24 10:13:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 53e195cfd6cc0febdd124ead7fd61758 SHA-1: 752504cd28a2f499a4d6493d65ad443a6df0b4b2 SHA-256: 357bf6b63a132d92621aa52d2835920d00bb4634921f9eea86aa5be90e25ea74
126 Risk Score

Malware Insights

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

The PDF contains an external URI pointing to a suspicious domain, identified as a link farm on disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URI suggest an attempt to redirect the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://leonvi.ru/123?utm_term=anaheim+high+school+haunted+history PDF link annotation
    • https://site-1192273.mozfiles.com/files/1192273/aws_load_balancer_target_group_cloudformation.pdfIn PDF document text
    • https://site-1194081.mozfiles.com/files/1194081/gangster_target_superhero_games.pdfIn PDF document text
    • https://site-1171753.mozfiles.com/files/1171753/6292410378.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369520/normal_5fcf09b4d5e75.pdfIn PDF document text
    • https://cdn.sqhk.co/mizenopujoli/aDY94SX/bloodsport_gif_jump_around.pdfIn PDF document text
    • https://site-1199272.mozfiles.com/files/1199272/pittsburgh_steelers_schedule_2018.pdfIn PDF document text
    • https://cdn.sqhk.co/jisaside/did9jgu/puvusufodasuwegu.pdfIn PDF document text
    • https://site-1249653.mozfiles.com/files/1249653/23729308126.pdfIn PDF document text
    • https://site-1168339.mozfiles.com/files/1168339/atlantica_online_2019.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393035/normal_5feb2f84486a2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412380/normal_5ffa983754f74.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446390/normal_5fe5fd017dc6c.pdfIn PDF document text
    • https://site-1173664.mozfiles.com/files/1173664/cute_born_babies_images.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/sejakopa/blocky_cars_mod_apk_7._1._3.pdfIn PDF document text
    • https://s3.amazonaws.com/lolijexejomak/bangla_natok_2018_jovan_mehjabin.pdfIn PDF document text
    • http://bajewilogofiro.epizy.com/clinical_guidelines_for_liver_transplantation.pdfIn PDF document text
    • http://bamalupit.rf.gd/appareillage_electrique_domestique.pdfIn PDF document text
    • http://xuwuxubemepimox.rf.gd/ravetuzufuxerudom.pdfIn PDF document text
    • https://s3.amazonaws.com/ganubatebedoxez/17163607255.pdfIn PDF document text
    • https://s3.amazonaws.com/litunux/12805566349.pdfIn PDF document text
    • http://bosefijov.epizy.com/kojagunizewu.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ea4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA4A 5324 bytes
SHA-256: 5d10cfc51551d34c28165d0e7fed34253086166a1cd0dffebe416c51dbca9f23
font_01_sfnt_off0000fc32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC32 10580 bytes
SHA-256: 02c9368b787433923da632c4b412147eab7fd4561dfbbbe0702c8aa5a9ca7f27
font_02_sfnt_off00012041.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12041 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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