Malicious PDF — malware analysis report

Static analysis result for SHA-256 bfac5f8b18dbd0b1…

MALICIOUS

PDF

78.5 KB Created: 2021-02-13 00:19:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: a15728710879ea8491a8ee8d1b4ea1f5 SHA-1: 3d044473003e623dfd75b350eeb29a499719eb03 SHA-256: bfac5f8b18dbd0b18c429e89091efd45bcd2c5bf177a43dfa1c2b8886fde07bc
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains an embedded URI pointing to a suspicious domain, which is likely part of the attack chain. The document body, though heavily obfuscated, suggests a lure related to a crossword puzzle, aiming to trick users into clicking the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://jottigo.ru/wix?keyword=skeletal+and+muscular+system+crossword+puzzle+answer+key PDF link annotation
    • https://cdn.sqhk.co/votezevon/ZHjiBqD/biraxexatekenezigapobako.pdfIn PDF document text
    • http://reduslim-ufficiale.website/soia_aduana_mexicoyaiz1.pdfIn PDF document text
    • https://cdn.sqhk.co/xopuwomu/2jiU2if/free_song_ringtones_for_iphone_app.pdfIn PDF document text
    • https://cdn.sqhk.co/bipadifudame/iaiiFFM/zifosodoburifijabet.pdfIn PDF document text
    • http://ionatr.fun/ligelepnvrfo.pdfIn PDF document text
    • http://greatmasters.biz/ripuriwiwanelupu8f75h.pdfIn PDF document text
    • https://cdn.sqhk.co/sujutowupolu/Wwjc6ic/2_seater_helicopter_for_sale_australia.pdfIn PDF document text
    • https://cdn.sqhk.co/risejesob/gejbgie/dinghy_skateboard_australia.pdfIn PDF document text
    • https://cdn.sqhk.co/rubutemoxe/cHcD3RK/amazon_music_hd_price_germany.pdfIn PDF document text
    • https://cdn.sqhk.co/mikedeto/06ljhhe/41156610207.pdfIn PDF document text
    • https://cdn.sqhk.co/mikevoponage/b2hgUgf/91152459233.pdfIn PDF document text
    • https://cdn.sqhk.co/wavefekus/4hjgqif/my_verizon_app_account_number.pdfIn PDF document text
    • https://cdn.sqhk.co/lusikagidet/cjgo8jc/usa_best_online_shopping_sites_for_mobiles.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/luxaduzimase/60045671171.pdfIn PDF document text
    • https://s3.amazonaws.com/verirejon/14822810254.pdfIn PDF document text
    • https://s3.amazonaws.com/tojazudibumogab/firutomuwaborasujugi.pdfIn PDF document text
    • https://s3.amazonaws.com/ligole/718438889.pdfIn PDF document text
    • https://s3.amazonaws.com/tikofaketonub/69488371694.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d840.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD840 3932 bytes
SHA-256: ebfeb304b0f191fbf56d18da4bd37a9b52d26d1fb8bd408c58fe486fed2c223b
font_01_sfnt_off0000e613.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE613 5464 bytes
SHA-256: c9c2660f1875b1aac0ef86b7bca420d8093c3f71068bb58127ace0b90b689f5d
font_02_sfnt_off0000f8a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8A4 10324 bytes
SHA-256: fc33c21a841676386750e7c4b5c5d2467d8c2cc4326b05ebbbeadafb6d566328
font_03_sfnt_off00011bed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BED 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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