Malicious PDF — malware analysis report

Static analysis result for SHA-256 bf36183df6a4311e…

MALICIOUS

PDF

82.3 KB Created: 2021-03-01 22:44:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: d8c2dea4f289154c7988ca124bd257a4 SHA-1: cd6c8ed9cc0f8c459ed1ef40ab2f27385783e3b4 SHA-256: bf36183df6a4311ec97b31c4b553d8ec5863ce3ac9453555696f2d1c5c77f526
126 Risk Score

Malware Insights

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

The PDF document was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous external URIs, many hosted on disposable domains, suggesting a link farm or redirection infrastructure. The document body, though heavily obfuscated, appears to reference a workbook, likely a lure to entice users to click on the embedded malicious links.

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://bologen.ru/123?utm_term=discerning+the+voice+of+god+workbook+answers PDF link annotation
    • http://gouliwer.online/computer_hardware_definition_and_examplesxte44.pdfIn PDF document text
    • https://cdn.sqhk.co/wekaradukuve/gd5Hjf9/must_have_woodshop_power_tools.pdfIn PDF document text
    • https://cdn.sqhk.co/xonipavu/kZ2FhbH/63268606294.pdfIn PDF document text
    • https://cdn.sqhk.co/gopuxipo/mievkzx/4828050608.pdfIn PDF document text
    • http://strahauto.website/gizexadigufigenujaxeg77wym.pdfIn PDF document text
    • http://memimusisat.getenjoyment.net/toshiba_tv_universal_remote_codes.pdfIn PDF document text
    • http://clebohets.xyz/87059314866o563h.pdfIn PDF document text
    • https://cdn.sqhk.co/zumufapofow/xjbhcWF/kizuwex.pdfIn PDF document text
    • http://jiteruruw.sportsontheweb.net/83096096422.pdfIn PDF document text
    • https://cdn.sqhk.co/xuxiropuwomo/jc82Yri/13991889864.pdfIn PDF document text
    • http://jufawet.iblogger.org/ac_market_app_for_iphone.pdfIn PDF document text
    • https://cdn.sqhk.co/gotuxixovumu/PFiahhT/lamy_rollerball_pens_amazon.pdfIn PDF document text
    • http://loneresel.mygamesonline.org/hamilton_beach_countertop_convection__rotisserie_oven.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • http://winupenelipumo.epizy.com/jimowow.pdfIn PDF document text
    • http://lejiletuvasipib.onlinewebshop.net/41071790246.pdfIn PDF document text
    • http://retesatitogeli.epizy.com/jogofebibowa.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://www.gnu.org/licenses/gpl.htmlIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d930.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD930 5608 bytes
SHA-256: dec7587040f75f2b41307cdd0e4a7cf6c47bb1ac1731ce782f139a7dfce843d5
font_01_sfnt_off0000ec51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC51 5852 bytes
SHA-256: 4eb640e1f3fabda5edbf826275fd2b4fcf019bdef00b8e9104a7c9cd1fc42218
font_02_sfnt_off0000fb08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB08 12740 bytes
SHA-256: fa66093cd2cde320322134ff1d788b9d4482c661be2d58f82198ed71ec667881
font_03_sfnt_off00012701.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12701 16028 bytes
SHA-256: 8345d1cc2b6b461b856d0454e2cf67edf5851291b6d0ebf21a7da0c9813a2b7f

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