PDF malware analysis — malicious · 9b115b9a9a9be4e7

MALICIOUS

PDF

68.2 KB Created: 2021-03-04 06:37:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26

MD5: 4c2f4aab42cadfd12e4ed964b3cd2660 SHA-1: f3d3579df07f572c39a57a1180d8a0795e330cb1 SHA-256: 9b115b9a9a9be4e7493e33397e96495159e247cbad2763dfe270bcf1609ef418

96 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains multiple embedded URLs, one of which is directly referenced in the heuristic findings, suggesting a lure to a malicious site. The document body, though heavily obfuscated, appears to contain product-related keywords, likely to trick users into clicking the embedded 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://nipisod.ru/award?keyword=oster+3+cup+food+chopper+attachment PDF link annotation
- https://cdn.sqhk.co/lewatesudo/hgciejj/72411619600.pdfIn PDF document text
- http://zitugaxusi.mygamesonline.org/sharp_portable_air_conditioner_window_adapter_kit.pdfIn PDF document text
- https://cdn.sqhk.co/nasanoroge/t8jjR1j/12369549317.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4424935/normal_60256bea27da2.pdfIn PDF document text
- http://prosucre.pro/respiratory_system_labeled_diagram_worksheetwtqsq.pdfIn PDF document text
- https://cdn.sqhk.co/zizenozi/hijijim/two_dots_over_u_in_spanish.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4387420/normal_5fd340ad1c57b.pdfIn PDF document text
- https://cdn.sqhk.co/jabosuve/bghgdib/dice_roller_dnd_beyond.pdfIn PDF document text
- https://cdn.sqhk.co/suxujaba/gh3RqIj/touch_em_all_joe_artwork.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/vibuvomomuv/algebraic_geometry_example_sheet.pdfIn PDF document text
- https://s3.amazonaws.com/dobikasukavu/47971525419.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 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000cc59.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xCC59	5556 bytes
SHA-256: `dd7be9ea2da569b103beb479a497abdbbd2c932c8b49469cd2781059049a9951`
`font_01_sfnt_off0000df13.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDF13	10356 bytes
SHA-256: `e82533388375438a50b92b1487f21a125ad7f99e2a92094bdabc6ab5c5422d0f`

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