Malicious PDF — malware analysis report

Static analysis result for SHA-256 7fd8b8a12519b992…

MALICIOUS

PDF

82.0 KB Created: 2021-02-18 04:05:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: 0069f23a89ca256fb35c7dfdd29fc139 SHA-1: 21b55f4ddc16401a83a8b83fbb983dcbd247cee9 SHA-256: 7fd8b8a12519b992b5e6ed9c79a031d823fb96fec2250da95e3cedecdf9d5fc4
96 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to a URL that appears to be a lure for downloading an Android APK, suggesting a phishing or malware distribution attempt. The document body, though heavily obfuscated, contains text related to 'Market unlocker root apk', reinforcing the phishing lure.

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/wix?keyword=market+unlocker+root+apk PDF link annotation
    • https://cdn.sqhk.co/libegavezu/yhf1Jey/18576983055.pdfIn PDF document text
    • http://vorusobowa.66ghz.com/fatca_reporting_deadline_malta.pdfIn PDF document text
    • https://cdn.sqhk.co/kugugofawaz/Xif9Yif/harkins_theatres_tucson_spectrum_18_movies.pdfIn PDF document text
    • http://trastenmyqort.online/nimaduxibotunokakitkt22t.pdfIn PDF document text
    • http://instapriz.website/change_notification_center_androidyznxt.pdfIn PDF document text
    • http://kungfumalibu.com/91293514651o4sb7.pdfIn PDF document text
    • https://cdn.sqhk.co/remowiwa/ggguhcr/9422744417.pdfIn PDF document text
    • https://cdn.sqhk.co/nujekezitifi/1aihh5j/assassin_lord_idle_rpg.pdfIn PDF document text
    • https://cdn.sqhk.co/jadepibake/p0Rgeji/sexuzafeza.pdfIn PDF document text
    • https://cdn.sqhk.co/sojowidaz/eifidgd/shipping_line_manager_resume.pdfIn PDF document text
    • https://cdn.sqhk.co/pubodegosog/jgheqih/bekebobejixalolivifikek.pdfIn PDF document text
    • http://springwin.space/merge_bottle_kawaii_idle_evolution_clicker_gamelxvmw.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
    • https://s3.amazonaws.com/rizezobabub/english_to_bengali_language_translator_free.pdfIn PDF document text
    • https://s3.amazonaws.com/wizomoravazub/lazave.pdfIn PDF document text
    • https://s3.amazonaws.com/tupofelasujewas/french_dictionary_audio_pronunciation_free.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fa17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA17 4652 bytes
SHA-256: d14a7ae386d877ea2c4f413c28bf9a7fc88a26621bc8ed5a5c47404165f7a548
font_01_sfnt_off000109fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109FD 10312 bytes
SHA-256: 0f663bae8642c82eba1c470fbc610318fb179562e95086bcf8293eeebc1949f5
font_02_sfnt_off00012d4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D4A 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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