Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a45718c152400e0…

MALICIOUS

PDF

74.0 KB Created: 2021-05-01 13:07:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1dbddce60ec987f722f76e40d9f0278c SHA-1: aead64e750750057e607a21cdd24c2a781c8da9f SHA-256: 1a45718c152400e020ba9e7b9047580ccbd5cb5fd26285209f86e420165f7885
96 Risk Score

Malware Insights

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

The file is a PDF document flagged by ClamAV and an ML classifier as malicious. It contains an embedded URI pointing to a suspicious domain, 'resalured.ru', which is likely used to host a phishing page or distribute further malware. The presence of multiple unknown URLs further supports a malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://resalured.ru/strik?utm_term=buy+older+snapper+riding+mower
    • http://totalcreditcheck.info/the_price_of_admission_loud_housew22tr.pdf
    • http://tk-time.site/33632231971sjcx9.pdf
    • http://natorg.fun/tubebunuloropitcmo1j.pdf
    • http://samelike.site/smartwatch_sync_bluetooth_notifier_pro_apkifujo.pdf
    • https://cdn.sqhk.co/letaziseb/ehabije/33397759587.pdf
    • http://tramlaweq.online/620009306533zqmb.pdf
    • https://cdn.sqhk.co/sadirorig/jejigfz/boxagu.pdf
    • http://se-mrush.com/18696695921ruqsc.pdf
    • http://laxana.ru/zojevaziwetubonix03zkt.pdf
    • http://varistop.site/20064544197pg3us.pdf
    • http://kukushka.space/529067517077co80.pdf
    • http://hisgohar.site/vedojudusagesodowejedk6qfa.pdf
    • https://cdn.sqhk.co/muzorefu/2aghsJQ/82379444763.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/57e53121-bdc1-42c4-99be-102e7ed208b6/99692993188.pdf
    • https://s3.amazonaws.com/xebuvuwov/breeding_sanctuary_dragon_city_breeding_guide.pdf
    • https://uploads.strikinglycdn.com/files/65efa214-9026-4616-8650-7fd88be54b5a/why_does_my_oscillating_sprinkler_get_stuck.pdf
    • https://uploads.strikinglycdn.com/files/b960c349-88e5-483b-b294-1426f87016c3/persepolis_comic_strip.pdf
    • https://s3.amazonaws.com/jijumupade/caslon_font_for_word.pdf
    • https://uploads.strikinglycdn.com/files/da972448-71e6-4c92-a57c-6ef31ae71bf9/romozizomebi.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e3b3.bin
9aa3eed0b5640e59e19be861f91f0f166712c6fd2215b9a209da57643fce4cbc
pdf-font-stream PDF embedded font (sfnt) at offset 0xE3B3 5524 bytes
font_01_sfnt_off0000f680.bin
cdd10075c6dcea854ea4e94b91d48238021aa59c6930e6e79afa36a64264b468
pdf-font-stream PDF embedded font (sfnt) at offset 0xF680 10740 bytes