Malicious PDF — malware analysis report

Static analysis result for SHA-256 b3d904223d1ea4a1…

MALICIOUS

PDF

104.3 KB Created: 2021-02-25 08:53:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: 91f17ee89ec8039c508de7a565a3d3d5 SHA-1: dd755d6c1e415fa439bfff1c642db6eeec1d0360 SHA-256: b3d904223d1ea4a1a812fb078bdd8f592d79b627706000b53c97a2aa50c515ec
126 Risk Score

Malware Insights

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

The PDF file contains embedded URLs and is flagged by multiple heuristics, including ClamAV and an ML classifier, as malicious and phishing-related. The document body, though heavily obfuscated, suggests a lure related to 'My hero academia english dub schedule' to direct users to external sites. The presence of numerous external URIs and link farm characteristics further supports a phishing or malicious redirection attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/wix?keyword=my+hero+academia+english+dub+schedule PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4481173/normal_5fee64860bdf9.pdfIn PDF document text
    • http://romeoplanet.club/livre_recette_cookeox7kjc.pdfIn PDF document text
    • http://zavarivaemvmeste.ru/gosijuzepebhdl1.pdfIn PDF document text
    • http://taxevidel.medianewsonline.com/rajewuwomukake.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465564/normal_60297a3bb7187.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393179/normal_5ff48c7fc02dd.pdfIn PDF document text
    • http://digtalcaliper09.xyz/wolujofan10wwr.pdfIn PDF document text
    • https://vokinojen.weebly.com/uploads/1/3/4/8/134851280/4688106.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lisunamubeso.epizy.com/19365111482.pdfIn PDF document text
    • http://xefivaz.epizy.com/veberaf.pdfIn PDF document text
    • http://bopefurolo.rf.gd/64620599463.pdfIn PDF document text
    • http://vupikefugogulup.epizy.com/xekijiboxef.pdfIn PDF document text
    • http://taludoxatimepup.rf.gd/how_to_put_a_safety_1st_infant_car_seat_together.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00013173.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13173 3324 bytes
SHA-256: 3bc07182f25fb7a53c3a86db1ba329f1ea279df63b1a8b5793a624477b9229bf
font_01_sfnt_off00013d5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13D5D 5600 bytes
SHA-256: 0cee5d0df93dac03ed4e8561d6174f785a6b3c8b81b19287ca38449eb9e41679
font_02_sfnt_off0001503f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1503F 4092 bytes
SHA-256: 2e0f2e7b29b5934b4863f2a48942e83cbcb347bb782470ab30dda1275b0149fb
font_03_sfnt_off00015fe5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15FE5 16668 bytes
SHA-256: da1b3f3073050f5c0cc9347749ef5ea2c2c21f14fba51816b20e423d7b543410

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