Malicious PDF — malware analysis report

Static analysis result for SHA-256 887ab0907362364f…

MALICIOUS

PDF

72.4 KB Created: 2021-02-23 15:54:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 9aa29f39f06feb8067b373f589a2a319 SHA-1: 5d086cc066bfad05ed1399e438dfe991a322018a SHA-256: 887ab0907362364f0c6e9439f1e4cdc2626ee5dae8d3badb6e6ecac67442dc66
244 Risk Score

Malware Insights

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

This PDF file contains numerous links to external websites, many of which are hosted on disposable domains and flagged as malicious redirectors. The document body, though heavily obfuscated, appears to be a lure related to 'army corps of engineers florida permit search'. The primary function seems to be directing users to malicious infrastructure, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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.
  • 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://crophysi.ru/wix?keyword=army+corps+of+engineers+florida+permit+search In PDF document text
    • https://cdn-cms.f-static.net/uploads/4385887/normal_6034765d198a2.pdfIn PDF document text
    • https://cdn.sqhk.co/dediwifime/XN7OIdC/1572287447.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4487663/normal_5ff3533e99d03.pdfIn PDF document text
    • http://sewalenugebob.iblogger.org/moxedewamowiwoxodumakapu.pdfIn PDF document text
    • https://cdn.sqhk.co/toxaxiked/WH284jg/water_tracks_racer_fast_speed_water_car_racers.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449616/normal_5fe7692b52278.pdfIn PDF document text
    • https://puwoposujol.weebly.com/uploads/1/3/0/9/130969317/d3ba6cd47.pdfIn PDF document text
    • https://cdn.sqhk.co/puzukebejas/yhbhjhe/xuletuzowavi.pdfIn PDF document text
    • https://pagununida.weebly.com/uploads/1/3/4/8/134861868/tekaxutizip-gowodol-kijitikevumanu-kolekit.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450517/normal_5ff5e49f61dfc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444092/normal_602f0bc800249.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420014/normal_5fe85489cddc1.pdfIn PDF document text
    • https://cdn.sqhk.co/xixujipum/jgg4mgi/batufolezetazadekerum.pdfIn PDF document text
    • https://poroxokinawutaj.weebly.com/uploads/1/3/4/5/134507376/jogevozagakaru_fivapilezomapo_guzeru_lemetumaxuxoz.pdfIn PDF document text
    • http://futiwakeso.22web.org/gazisukulerefoxod.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375528/normal_5fc6babe79870.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495240/normal_600f9e872fe1a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://mewozukejos.rf.gd/restaurant_cassis_guide_du_routard.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dcdc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCDC 5660 bytes
SHA-256: 2d5770fa6551f002d277177d445358e17c7f5cf1a8e62d707795827d0421b06e
font_01_sfnt_off0000effc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFFC 10588 bytes
SHA-256: daf3ba3267db2545234dbf341414dcae3abbda3074aac2ed727253f8187f7cad

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