PDF malware analysis — malicious · e5f42c083f38f5e3

MALICIOUS

PDF

94.2 KB Created: 2021-02-14 11:39:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23

MD5: f39329e1be6b213e3e4ee055d89ae4db SHA-1: 42957d889f3f2d0ab435f9051dda0accff28e7ad SHA-256: e5f42c083f38f5e34e0b29f537006974c5ee3e8793da951b5a61b65848deae0e

214 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of embedded links, with one identified as a malicious redirector. The heuristic 'PDF_SEO_LINK_FARM' indicates a mass of external PDF links, suggesting an attempt to manipulate search engine results or distribute malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution via the embedded URLs.

Machine Learning

Nyx PDF Classifier malicious score 0.9992

Heuristics 5

ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK

PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM

Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
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://crophysi.ru/wix?keyword=hero+clicker+hacked In PDF document text
- https://xixasoxi.weebly.com/uploads/1/3/5/3/135324484/4039540.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4479923/normal_601347585bd9a.pdfIn PDF document text
- http://sebemigon.66ghz.com/tatojelovewetanidojidadil.pdfIn PDF document text
- https://siganubamisibu.weebly.com/uploads/1/3/4/1/134108806/tuvino-kunoteneruv-disopojez.pdfIn PDF document text
- https://lebotisoko.weebly.com/uploads/1/3/4/5/134597635/raxepa_dabavadotufi.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4388612/normal_5fc6f3bfb1cd7.pdfIn PDF document text
- https://kudezugomolalu.weebly.com/uploads/1/3/5/3/135331411/xugoji-lepijulamug-rijatajoloze-leken.pdfIn PDF document text
- http://www.opentle.orgIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- https://s3.amazonaws.com/lomuper/dividends_in_balance_sheet_or_income_statement.pdfIn PDF document text
- http://buxazub.epizy.com/77763179869.pdfIn PDF document text
- https://s3.amazonaws.com/xuxifuzituwu/pejudatubiwo.pdfIn PDF document text
- https://s3.amazonaws.com/gasodamuza/gradle_test_report_customization.pdfIn PDF document text
- https://s3.amazonaws.com/waxegatulo/meaning_of_appendix_in_report_writing.pdfIn PDF document text
- http://tidewoxawutose.epizy.com/psychology_intake_form_template.pdfIn PDF document text
- https://s3.amazonaws.com/rorives/ada_2017_guidelines_algorithm.pdfIn PDF document text
- http://pifexowofimef.epizy.com/linking_verb_worksheets_grade_3.pdfIn PDF document text
- https://s3.amazonaws.com/niwotipugonuvoz/fgd4536_datasheet.pdfIn PDF document text
- https://s3.amazonaws.com/fovezewi/avis_sur_centre_de_formation_europen.pdfIn PDF document text
- https://s3.amazonaws.com/vekodupiwarobi/tru_talk_video_song_mr_jatt.pdfIn PDF document text
- https://s3.amazonaws.com/degagaziv/55960828693.pdfIn PDF document text
- https://s3.amazonaws.com/votawawo/77365435213.pdfIn PDF document text
- https://s3.amazonaws.com/fejififimaketo/business_card_templates_adobe_illustrator.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://www.gnu.org/licenses/gpl.htmlIn PDF document text
- http://dejavu.sourceforge.netIn PDF document text
- http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
- http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`stream_004_off000101d5.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x101D5	9592 bytes
SHA-256: `252841297d9700210f0646e7d021a3b6411f2c473eb8403e31a4e8abec182037`
`stream_006_off000148d2.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x148D2	20624 bytes
SHA-256: `562a95df4a243e40bf7171e00a063ef0d46823a084287fbb2fc7f933fc254476`
`font_00_sfnt_off0000f15d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF15D	4872 bytes
SHA-256: `a280eb2721045b7359433d2e509192b875bb6070c659b0386caf08eada962c41`
`font_02_sfnt_off00011cd9.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11CD9	13544 bytes
SHA-256: `beb30c2af8649d22fe168b6b9a2d2cd0291522b17e3de80dfa4f06bade477400`

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