PDF malware analysis — malicious · b4ec8e8bd02265b2

MALICIOUS

PDF

77.5 KB Created: 2021-03-30 23:19:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25

MD5: 500a7cfff46e64e54c3fab7446768284 SHA-1: 3ed0b7e8c32ea2f16a9914a69de9f8ab9eaa8dcc SHA-256: b4ec8e8bd02265b20698672bc12939458279d4e67ada89c635e16c36e1183343

126 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains obfuscated text that appears to be a lure related to controlling a soundbar with an Xfinity remote. It embeds a URL that leads to a suspicious domain, likely intended to host a malicious payload or phishing page. The ML classifier and ClamAV detection strongly indicate malicious intent, consistent with a phishing or credential harvesting attack.

Machine Learning

Nyx PDF Classifier malicious score 0.9991

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
Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM

Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
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://xajibur.ru/strik?utm_term=how+to+control+my+soundbar+with+xfinity+remote PDF link annotation
- https://cdn-cms.f-static.net/uploads/4417426/normal_601bf98e13129.pdfIn PDF document text
- https://kumuditev.weebly.com/uploads/1/3/2/7/132712302/tuxilejunep.pdfIn PDF document text
- https://tezanifarepuji.weebly.com/uploads/1/3/0/7/130775277/mimipisib.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4408992/normal_600132d55ef1e.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4471688/normal_604ca286af396.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4469860/normal_604a106247ccf.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4415326/normal_604fdfebaea62.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4465685/normal_5fd30985e2a75.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4409623/normal_5fe39cf4833ea.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4392656/normal_6052cbfd77f30.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4369648/normal_5ff9ed36a3fec.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- https://9f9bd9fa-00fe-4673-b34e-9a629881f524.filesusr.com/ugd/09273f_fe26e9b777d7439e9d955ba471f282f1.pdf?index=trueIn PDF document text
- https://da99f664-88c7-4a27-98aa-0bbcec2e8f57.filesusr.com/ugd/66f3f9_5b63ad4aa508470daa9e982ab51b7b20.pdf?index=trueIn PDF document text
- https://s3.amazonaws.com/gezejoputiwinu/bed_sheets_king_size_cotton.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/55cb3287-4ac2-41b7-93f9-4b2af58698fb/86973506133.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/66f14fec-93ca-4a91-9337-3188db6944ad/fovogajop.pdfIn PDF document text
- https://s3.amazonaws.com/nonabafat/44940605867.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/0996c1b7-6449-4ebf-9e43-8e02ba838a8e/presto_dehydro_review.pdfIn PDF document text
- https://s3.amazonaws.com/vipinib/gawatudomokixoreguzowigu.pdfIn PDF document text
- https://s3.amazonaws.com/jijumupade/65169674310.pdfIn PDF document text
- https://s3.amazonaws.com/farezelof/xinelimon.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/5e9b62b1-6904-4976-9079-4f7f7ca50101/voruses.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/c9afa8b3-cec6-4492-924b-959e2ccdba1c/jewuturemij.pdfIn PDF document text
- https://176fe727-baa2-4f6f-8ab0-cddcd97ecb74.filesusr.com/ugd/45df28_1937d7cdf8954b87b1722328d6deef60.pdf?index=trueIn 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_off0000efd2.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEFD2	5624 bytes
SHA-256: `2b9ffe1c96ad24c05ae775554516828119f7bfde39fa5a7789e36297e90e4137`
`font_01_sfnt_off000102de.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x102DE	10968 bytes
SHA-256: `64a8f71483bf6a04273ecf3c29b9302edf3cc26a2c3bfbe5bdac8811d1382efb`

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