PDF malware analysis — malicious · 8c5a00c4e4a5a81c

MALICIOUS

PDF

81.0 KB Created: 2021-04-06 00:23:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23

MD5: 623550104ec63f5feb54c24696a18330 SHA-1: 1c1d132b82439fbe35155be5ddf498309d322dfa SHA-256: 8c5a00c4e4a5a81c3d0bc146e6a5b636fcb2d93c2c320035762147496c8d95ed

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of external links, with one heuristic specifically identifying it as a 'PDF_SEO_LINK_FARM'. The primary malicious URL, 'https://jumiwimov.ru/strik?utm_term=910+smartcode+traditional+electronic+deadbolt+with+zigbee+technology', is directly embedded and likely serves as a lure. ClamAV detection and ML classification further support its malicious nature, indicating it's likely a phishing or malware distribution document.

Machine Learning

Nyx PDF Classifier malicious score 0.9996

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
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.
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://jumiwimov.ru/strik?utm_term=910+smartcode+traditional+electronic+deadbolt+with+zigbee+technology PDF link annotation
- https://namodezax.weebly.com/uploads/1/3/6/0/136055978/janulowe-tikuzijiga.pdfIn PDF document text
- https://nakofasojerurog.weebly.com/uploads/1/3/4/5/134592478/zipivedulepediw.pdfIn PDF document text
- https://xaxozugine.weebly.com/uploads/1/3/2/3/132303195/b5f9dcd6.pdfIn PDF document text
- https://rofobanajogano.weebly.com/uploads/1/3/1/1/131164113/6047782.pdfIn PDF document text
- https://jebelobuf.weebly.com/uploads/1/3/1/4/131452997/2275417.pdfIn PDF document text
- https://kawapojironene.weebly.com/uploads/1/3/1/6/131637385/xowofin.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/dutuzanob/corporate_office_properties_trust_annual_report_2018.pdfIn PDF document text
- https://5c51e3d7-2896-491e-a255-1b002e356b93.filesusr.com/ugd/5b6ce5_99266c14bfdb4b62a3496e7fdce9d494.pdf?index=trueIn PDF document text
- https://s3.amazonaws.com/didowugorokirug/brunton_pocket_transit_manual.pdfIn PDF document text
- https://s3.amazonaws.com/defujo/syma_x11c_charger.pdfIn PDF document text
- https://s3.amazonaws.com/lovetijif/97078198340.pdfIn PDF document text
- http://livixutufedesuv.epizy.com/liwodakemutubugon.pdfIn PDF document text
- https://s3.amazonaws.com/vigevot/52801556397.pdfIn PDF document text
- https://s3.amazonaws.com/kudowo/difinekodimarolekuxiji.pdfIn PDF document text
- http://legipugubawaw.epizy.com/jixanil.pdfIn PDF document text
- https://s3.amazonaws.com/luborinizu/bandsaw_blade_guides_for_sale.pdfIn PDF document text
- https://60883313-e483-4213-bdf2-3844198a3b35.filesusr.com/ugd/3ba96b_4562e911d5be49d4b8c6839b4c5c1adc.pdf?index=trueIn PDF document text
- https://db6d201d-bdff-4648-9982-d9cfaac7639e.filesusr.com/ugd/98857b_6d6ea6baf0ab4e0b844b28a229a2e632.pdf?index=trueIn PDF document text
- https://45f61934-b4a1-4335-a9e3-e142d9465b5b.filesusr.com/ugd/0dd040_24655a784f45452582210e17185bc7fb.pdf?index=trueIn PDF document text
- https://d0275d90-c5b4-4c72-b581-d0e2b62fc6dd.filesusr.com/ugd/ee54da_e382001921944ecfba68d7cb381c41b2.pdf?index=trueIn PDF document text
- http://nezuwuxupewe.rf.gd/xusazavijavolixige.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_off0000e931.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE931	5780 bytes
SHA-256: `38d938dcf7e276fef956f6707704a3d2f4ee2ceaf3e06cf9e43a1d9bc51d381e`
`font_01_sfnt_off0000fcb7.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFCB7	12072 bytes
SHA-256: `856b2c7389b3e0d7d50ea775ef1a4357d2cd30d5ea209724006cdc8a29d07869`
`font_02_sfnt_off000125be.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x125BE	4324 bytes
SHA-256: `7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71`

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