Malicious PDF — malware analysis report

Static analysis result for SHA-256 1b5ac30e20822edc…

MALICIOUS

PDF

76.0 KB Created: 2021-05-04 13:49:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8aa424e68bfdaac6fdeb506673b3c455 SHA-1: d121d2707851c599fff55bd49ea38b02f37985a6 SHA-256: 1b5ac30e20822edc8ecec6b120713c799578169160a1055a6aab1278508c0f85
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 URL that redirects to a suspicious domain, likely serving the malicious content. The document body, though heavily obfuscated, suggests a lure related to 'procreate pocket' to entice users to click the malicious link.

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://dafemum.ru/strik?utm_term=how+to+use+bucket+in+procreate+pocket
    • https://cdn.sqhk.co/jorubili/hldoidI/xuzosozavifivukavowekis.pdf
    • https://cdn.sqhk.co/jivazufevi/hiXCcsi/nick_folk_patriots_kicker.pdf
    • https://cdn.sqhk.co/wesaduleb/k9hihaM/sofulisumekuvepizujakuziz.pdf
    • https://cdn.sqhk.co/xozifejor/Tjghjib/xasozofikubilalefuren.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/pigolo/blood_bowl_skills.pdf
    • https://uploads.strikinglycdn.com/files/68241669-bd2b-4fc1-8a2c-f8e1e7f5940c/43304309168.pdf
    • https://s3.amazonaws.com/zukogi/92460356436.pdf
    • https://s3.amazonaws.com/bomifabipi/vudadigafux.pdf
    • http://kivarutumo.myartsonline.com/barigitelevajavalimeligel.pdf
    • https://s3.amazonaws.com/kudowo/betraying_the_martyrs_phantom.pdf
    • https://uploads.strikinglycdn.com/files/cc80ef66-78da-4065-8fa1-1da78d1ed8f2/58616078592.pdf
    • https://s3.amazonaws.com/sevoga/24119602482.pdf
    • https://uploads.strikinglycdn.com/files/3c9856ee-2b4f-492a-8981-af56180e51d0/hp_laserjet_pro_400_m401dne_specifications.pdf
    • http://fadezanunadafik.myartsonline.com/sofuwave.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d5ce.bin
bda30957dee8ed2148d8fa17164d373eb9ebcb3b375a0696a26e9aaef69acd1f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD5CE 5032 bytes
font_01_sfnt_off0000e6fc.bin
d455e586bf452a529e2108e39e274c9a042083c04e0131ff28b7b395c0dadd40		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE6FC 20484 bytes
font_02_sfnt_off00011505.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11505 4324 bytes

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