Malicious PDF — malware analysis report

Static analysis result for SHA-256 88703ed162b2c1d5…

MALICIOUS

PDF

77.5 KB Created: 2021-03-20 16:58:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: ec37db0b24be07fa5a80992eca22edf8 SHA-1: 9e3fc5ef7d20a8ae626097fbe6b1e2e33d950121 SHA-256: 88703ed162b2c1d5c05879c704c7ce1eb3dc74097cf7831b4a7e96ce00e6c42c
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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 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.
  • 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/award?keyword=define+teaching+methods+pdf PDF link annotation
    • http://datingdate.site/octopus_64_bit_apk_androidd671i.pdfIn PDF document text
    • http://wordwild-store.com/xiberuwekabn2pr.pdfIn PDF document text
    • http://zugemuvireri.22web.org/36869850466.pdfIn PDF document text
    • http://cabinetsly.xyz/gulutivaboruwugafirbx0xq.pdfIn PDF document text
    • https://tuxutumixebapi.weebly.com/uploads/1/3/1/4/131438514/rizajuxajumoz.pdfIn PDF document text
    • https://wixotavu.weebly.com/uploads/1/3/4/7/134764887/2451190.pdfIn PDF document text
    • https://pejejuwefosewa.weebly.com/uploads/1/3/4/0/134040570/7824571.pdfIn PDF document text
    • http://siruxovilojo.iblogger.org/is_annika_in_the_art_of_racing_in_the_rain_movie.pdfIn PDF document text
    • https://wasexakenisopi.weebly.com/uploads/1/3/5/9/135982815/6194078.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
    • http://duxurajixi.rf.gd/34261810713.pdfIn PDF document text
    • http://kasisexa.rf.gd/asus_aura_lighting_control.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/94b169f4-e885-4065-8daf-f714d5ade97f/notacion_cientifica_ejercicios_resueltos.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d62db251-1d47-482b-80c9-b4a22980f0cf/6789843056.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6812e0b5-00f1-42fa-b5f3-a394dc1a1382/bonaire_evaporative_cooler_replacement_parts.pdfIn PDF document text
    • http://felobiziwikegu.rf.gd/regapezowikelidu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cde29d03-5fa9-4952-ac68-dc1ce7616ee2/canon_powershot_sx720_hs_reset.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8f82ebe7-df64-40dc-824d-a267d0da3e73/bivedeg.pdfIn PDF document text
    • http://rilifufamorupud.epizy.com/barbee_lake_fishing_report.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

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e15d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE15D 5228 bytes
SHA-256: 04136853e636763f6f67fe47aaf5a2a3982843ae35dcbd967b31f0c823550d65
font_01_sfnt_off0000f306.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF306 11620 bytes
SHA-256: 99802a8f36e177374f7321bf7be63b3c7f95fa7e14a667b54b6ebf49db4bd978
font_02_sfnt_off00011a88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A88 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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