Malicious PDF — malware analysis report

Static analysis result for SHA-256 5920f28588d8f96b…

MALICIOUS

PDF

162.3 KB Created: 2021-03-23 12:53:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 41fe215403d4761a2ad86438ba609572 SHA-1: 0482d4e3be9690bffdd7ab19404729e043e762dd SHA-256: 5920f28588d8f96b87bbeb8df2facf90c3e358c6db3989cabcb4e2ef9fe6ee47
116 Risk Score

Malware Insights

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

The PDF file contains heuristics indicating it is malformed and contains malicious content, as confirmed by ML classification and ClamAV. It embeds a URL that mimics a search result for 'aleister crowley pdf books', likely intended to trick the user into visiting a malicious site. While no scripts were explicitly extracted, the PDF structure and embedded URI suggest an attempt to redirect the user to a potentially malicious domain for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Malformed active-content stream length medium PDF_MALFORMED_EXPLOIT_STREAM_LENGTH
    A PDF stream that carries active/exploit-looking content has a declared /Length that does not match the recovered stream body. Malformed stream boundaries and length mismatches are common parser-evasion/supporting evidence around Reader exploit streams.
  • 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://soxebez.ru/award?keyword=aleister+crowley+pdf+books PDF link annotation
    • http://bonmarket.site/wogipewuwubarixez72cp.pdfIn PDF document text
    • http://mydenverneighborhoods.com/printable_kumon_math_worksheetswavxo.pdfIn PDF document text
    • http://wildber.store/bubodedofovotakavaguzewa2ia3k.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/nitizobuv/kibirakevuxidotelow.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/820917cc-91ad-401f-abbc-0c0ca5c85f37/which_species_has_the_largest_population.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2076cfaa-e7f2-4208-8b23-78fa02234b68/89412467799.pdfIn PDF document text
    • https://s3.amazonaws.com/daniwodug/furigegixi.pdfIn PDF document text
    • https://s3.amazonaws.com/vikukinumet/fms_flying_model_simulator_free.pdfIn PDF document text
    • https://s3.amazonaws.com/jedobufudajewu/94539919966.pdfIn PDF document text
    • https://s3.amazonaws.com/sinadi/jemig.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/38de6fbd-fefe-489a-a9b2-012cedee7fd6/62766939865.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0b39c135-bc3d-430a-9cc8-99f7167b2a30/logobotawo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/227064ec-2552-4a0e-a012-e300d1b17002/crochet_seed_stitch_blanket_pattern.pdfIn PDF document text
    • https://s3.amazonaws.com/jowutoneranemuk/borijosuw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/089f5cec-d28c-40d7-b191-6c1b2e4b0418/sharp_aquos_flashing_power_button.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d6632b4b-d555-44a4-975d-bd17df4cd15a/first_90_days.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/72814d0f-7d00-4cf5-9a51-432b77b34415/dlink_2750u_firmware_update_download_india.pdfIn PDF document text
    • https://s3.amazonaws.com/midaguvimabof/pofurexube.pdfIn PDF document text
    • https://s3.amazonaws.com/gasodamuza/34256444286.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000224f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x224F9 5324 bytes
SHA-256: 6f0ac3d1a7d1f4956f537cb39c71928633aac9287065a6e494b1778f0bda8f88
font_01_sfnt_off00023740.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x23740 14132 bytes
SHA-256: 98e4b154c9b83d1eef18185fbfb6152db3240ba6938dd871e6b5878cdf00a96b
font_02_sfnt_off000264ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x264FF 16088 bytes
SHA-256: ccd0ea095085b9379100d4de0d13d045157d8501f46cd3db2ef5c00475687e02

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