Malicious PDF — malware analysis report

Static analysis result for SHA-256 1b88a2567af073de…

MALICIOUS

PDF

72.4 KB Created: 2021-02-10 05:17:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 71ff616865faefb2cf687fe602f9d782 SHA-1: 420b4cba88c437250ed4e178da295b07790f706e SHA-256: 1b88a2567af073ded4946900285229621f8a25a80a6f0ca3822284b1467d6aba
96 Risk Score

Malware Insights

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

The file is a PDF document identified as malicious by ClamAV and an ML classifier. It contains an embedded URL pointing to a suspicious domain, likely intended to trick the user into downloading further malware or visiting a phishing site. The document body, though heavily obfuscated, suggests a lure related to a lease agreement.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://baarspo.ru/wb?keyword=lease%20agreement%20for%20rental%20property%20template PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4408721/normal_5fcaa6205fcde.pdfIn PDF document text
    • http://guwajokuxo.22web.org/enclose_porch_with_plastic_sheeting.pdfIn PDF document text
    • http://worldhold.online/76185819697p3ne.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4448332/normal_5fcdb8c91f5d3.pdfIn PDF document text
    • http://cosmicgig.com/dino_grand_city_simulator_apk6x5vc.pdfIn PDF document text
    • http://hellochildren.online/91806578641xhd0g.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383451/normal_60232f23d22ab.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4448103/normal_5feb6a4de2bb4.pdfIn PDF document text
    • http://expressvpn.store/nipulufemezivulawijesuma7qvxr.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/tujeviwakirawu/android_music_app_maker_free.pdfIn PDF document text
    • http://zomimek.epizy.com/phpmyadmin_date_format_table.pdfIn PDF document text
    • https://s3.amazonaws.com/kagedatabujo/rifoderinugavederepo.pdfIn PDF document text
    • https://s3.amazonaws.com/tixedujegibex/86051264568.pdfIn PDF document text
    • https://s3.amazonaws.com/lixisariwulo/22362457766.pdfIn PDF document text
    • https://s3.amazonaws.com/voxazedisula/bengaluru_bulls_video_song.pdfIn PDF document text
    • http://janutozekim.epizy.com/58933904250.pdfIn PDF document text
    • http://divifafapinuk.rf.gd/blow_brush_normal_font_free.pdfIn PDF document text
    • https://s3.amazonaws.com/jidagafinuxesu/zoxedasovetowafosa.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_off0000e070.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE070 5264 bytes
SHA-256: 5786763e6c1040c7acaeb9a770aa7133c380d5cd11ca778cfcbf2826834242e3
font_01_sfnt_off0000f252.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF252 9948 bytes
SHA-256: 11bf25984cead1d8a49aae813e76d0312a95ce6e98a3e6b59fdd8463997c6d9e

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