PDF malware analysis — malicious · da3a90709a6db418

MALICIOUS

PDF

81.8 KB Created: 2021-05-25 19:54:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16

MD5: b085248c67ae94d04a67531f64d2ba3f SHA-1: 2e3ba6e7c8203e10a5712a088479c4c5357a3fd4 SHA-256: da3a90709a6db4188cfbcfb97be406bb45ed4627c3177dfca8bafe833b14161a

96 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains an embedded URL that directs users to a suspicious domain, likely for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan. The document body, though heavily obfuscated, suggests a lure related to 'crossword puzzle answers' to entice clicks on the malicious link.

Machine Learning

Nyx PDF Classifier malicious score 0.9997

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://midufefew.ru/strik?utm_term=chapter+5+developing+communication+skills+crossword+puzzle+answers PDF link annotation
- https://cdn-cms.f-static.net/uploads/4387931/normal_60431cc3e583c.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4458161/normal_606ea4125bd08.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4480585/normal_605178a75df8f.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4377679/normal_5fd27cc87d7e7.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4454051/normal_5fe2505da7004.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4370077/normal_606945231819b.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4366063/normal_5ffdfad1b8e19.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4415526/normal_60502409d95bd.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4382976/normal_601b2c80eec46.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/jolozidabi/69046537998.pdfIn PDF document text
- https://s3.amazonaws.com/woxewiwupir/96180978569.pdfIn PDF document text
- https://s3.amazonaws.com/magapeguwabe/nugomoxemezixameriredebi.pdfIn PDF document text
- https://s3.amazonaws.com/gurafoga/41301467434.pdfIn PDF document text
- https://s3.amazonaws.com/nijudow/shutter_full_movie_in_tamil.pdfIn PDF document text
- https://s3.amazonaws.com/rodigapigeta/rizubopex.pdfIn PDF document text
- https://s3.amazonaws.com/vebisop/how_to_pray_for_your_future_marriage.pdfIn PDF document text
- https://s3.amazonaws.com/leteraxewe/batman_the_killing_joke_comic_value.pdfIn PDF document text
- https://s3.amazonaws.com/woberiz/graphic_benchmark_test.pdfIn PDF document text
- https://s3.amazonaws.com/wefemabeni/14230346116.pdfIn PDF document text
- https://s3.amazonaws.com/jonora/45601338384.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 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000f423.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF423	5784 bytes
SHA-256: `b3a004de163056244d3017d262ef1025ba395ed7d02ae1b47bbe8075a6a50a58`
`font_01_sfnt_off000107c6.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x107C6	10316 bytes
SHA-256: `778533418550aec99608aa49f5e1a7bd3d90fbae258403ca4623e3c8ad4e830c`
`font_02_sfnt_off00012abd.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12ABD	4324 bytes
SHA-256: `cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34`

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