Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e853c857eac17a4…

MALICIOUS

PDF

63.0 KB Created: 2021-02-18 17:38:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 085ff0ecec0dad9140777eb8ee92ce6e SHA-1: d5f424dd4c871e83a4c55bff4f1d4c669799ccae SHA-256: 4e853c857eac17a4b661a578bbfe632eb2ac7b291c143b5dcaaa1b9c9a6a6fb1
96 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to a suspicious domain, likely intended to redirect the user to a phishing or malware distribution site. The document body, though heavily obfuscated, suggests a lure related to a 'shape poem worksheet'. No scripts were extracted, but the presence of embedded URLs and the overall detection profile strongly suggest a phishing or malware delivery attempt.

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://maypoin.ru/wix?keyword=shape+poem+worksheet
    • http://astropsychology.site/26924405612uhrsj.pdf
    • https://static.s123-cdn-static.com/uploads/4426945/normal_5ff29e490da49.pdf
    • https://cdn.sqhk.co/rivogigaweb/dhijbML/dunkaroo_edible_cookie_dough.pdf
    • https://kamedewogivazu.weebly.com/uploads/1/3/4/0/134096977/bb758db73.pdf
    • http://jumpfs.space/xuxomifoseyo6.pdf
    • https://fagutefoxod.weebly.com/uploads/1/3/4/2/134235025/c087c.pdf
    • https://cdn.sqhk.co/rokajoten/JPYhe1u/stack_buffer_overflow_leetcode.pdf
    • https://cdn.sqhk.co/pujixefan/hcibajf/forest_hd_full_unlocked_live_wallpaper_download.pdf
    • https://cdn.sqhk.co/buzivafulet/ahaEEjh/bipanemuzedapozo.pdf
    • https://cdn.sqhk.co/rutesawir/ihWSiaX/commander_legends_release_date_uk.pdf
    • http://shopwithsale.website/uc_browser_mini_java6w1rh.pdf
    • https://cdn-cms.f-static.net/uploads/4393883/normal_60192caad3c71.pdf
    • https://cdn.sqhk.co/xafiguzi/hipggQ1/lifivigujex.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://tixuxunu.epizy.com/google_assistant_go_apk_free.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_off0000b9dc.bin
650e01aceb9d8c97af07597d55c44f57538498f11c1f5adb6dc3333a36148450		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB9DC 5288 bytes
font_01_sfnt_off0000cbbb.bin
06494deb44317844342500be4c5ed9cbf124decddcc5e782239f087d79c76a21		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCBBB 10704 bytes

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