Malicious PDF — malware analysis report

Static analysis result for SHA-256 84e708397acc435b…

MALICIOUS

PDF

80.5 KB Created: 2021-03-09 12:03:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 835d81f6965cfced8a5418e1ef8f5e5b SHA-1: 702cafd03187e6b8adacf153e260620b8aa7927e SHA-256: 84e708397acc435bcca9c6cb77abb6f7fdd4a1f9c0619ce4587f10ee19930b92
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 high likelihood of malicious intent. The embedded URL and numerous other URLs suggest the document is part of a phishing campaign, likely attempting to trick users into downloading further malware. The document body, though heavily obfuscated, contains keywords related to 'child support worksheet calculator', which is a common lure for phishing attacks.

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://bologen.ru/wix?keyword=child+support+worksheet+calculator+washington
    • https://nesibebinirudeb.weebly.com/uploads/1/3/5/3/135311353/9045380.pdf
    • https://kivenawuvu.weebly.com/uploads/1/3/1/1/131163776/7018858.pdf
    • http://kovuzaxaf.medianewsonline.com/26067398202.pdf
    • https://gimimelaxagoke.weebly.com/uploads/1/3/2/7/132740951/gudubukuxidedupi.pdf
    • http://rebelliona.online/sqlite_android_tutorialzgxre.pdf
    • http://myirn.icu/focusrite_scarlett_2i4_drivers_windows_10_updatedzo3k.pdf
    • https://gimitowogavu.weebly.com/uploads/1/3/4/7/134746983/5d6dec9f754.pdf
    • http://hotita.space/wuvasitowesed3sxc2.pdf
    • http://lezigovedavide.getenjoyment.net/confessions_of_a_mask_audiobook.pdf
    • http://g2am2e.xyz/mixefbzhi5.pdf
    • http://duplicwcnj.space/ccl_vacancy_2019505lm.pdf
    • https://tuxufinuzeleki.weebly.com/uploads/1/3/4/7/134737217/fukuraturutek.pdf
    • https://bafewalu.weebly.com/uploads/1/3/5/3/135350628/rugaxan.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/woxotopapozokev/76450627580.pdf
    • https://uploads.strikinglycdn.com/files/584a3f7a-692e-4906-865d-366d863f13ae/longman_dictionary_of_contemporary_english_apk.pdf
    • http://ditanumugagoma.myartsonline.com/how_to_make_your_own_philosophy_of_life.pdf
    • https://uploads.strikinglycdn.com/files/a58827e5-6a6b-4226-bb41-c1299eb46f78/it_essentials_exam_answers_2019.pdf
    • https://uploads.strikinglycdn.com/files/9378eb02-9031-4ddc-8d4a-4f6b19dc90f1/whirlpool_duet_sport_washer_cubic_feet.pdf
    • https://uploads.strikinglycdn.com/files/d67284ab-f866-4da7-a33d-217e4f976050/kirkland_spiral_sliced_hickory_smoked_ham_instructions.pdf
    • https://uploads.strikinglycdn.com/files/c3da1a00-1df8-4b97-b634-ec92d8e8e2b6/38899032789.pdf
    • https://s3.amazonaws.com/bededuxotulapil/tokonakogibomemawev.pdf
    • https://s3.amazonaws.com/wiremeresegikon/boris_fx_10._0_1_plugins_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_off0000fec9.bin
99a59e256cf4042915554e7b7a64d55a39e9162516f688f8c77ce1a0abe5558c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFEC9 5396 bytes
font_01_sfnt_off0001112c.bin
b5dda722a7001098c4e2d439b28782b14534c1da75bd1d91a33c4cba85cdc809		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1112C 10196 bytes

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