PDF malware analysis — malicious · afa1526bc6169349

MALICIOUS

PDF

75.7 KB Created: 2021-04-26 23:15:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23

MD5: cac15f4aaed63db5b33b619568fdc03b SHA-1: 102752d1e9b1446e0c2c85a57a9508136e46f841 SHA-256: afa1526bc616934991477818810b87f86a028ea70cbbc5c3e6f84ad1d9ae0786

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous external links, with one heuristic specifically identifying a 'PDF link farm' and another flagging an external URI. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded links suggest it's designed to redirect users to potentially malicious sites, likely for phishing or malware delivery.

Machine Learning

Nyx PDF Classifier malicious score 0.9989

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 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://botokaw.ru/strik?utm_term=tarjetas+de+los+72+nombres+de+dios+para+imprimir PDF link annotation
- http://visemomasa.66ghz.com/luziboxojajugusazizolu.pdfIn PDF document text
- http://gitutemove.iblogger.org/bunny_full_movie.pdfIn PDF document text
- http://pumujavebedopa.iblogger.org/amorphous_metal_core_transformers.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4405946/normal_601a6e3918c12.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4367301/normal_605aeb03a0d01.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/baritexovopa/messi_wallpaper_hd_for_android_mobile.pdfIn PDF document text
- https://18b62485-dce0-4e35-9712-b1d1f13fcb23.filesusr.com/ugd/296484_9c274ef5ab6f46ad9bb2159aa32b767b.pdf?index=trueIn PDF document text
- https://1b3fde16-7575-45ba-b40e-8916c64185ca.filesusr.com/ugd/8874e8_4b39ab74b45b46b7afa05ec7a9ff9872.pdf?index=trueIn PDF document text
- https://uploads.strikinglycdn.com/files/0ff61c1c-b268-4183-9ecd-a3f7240bf896/yamaha_hs8_review_what_hi_fi.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/6bff5a33-519f-46ce-bd39-abcec9344309/how_to_get_your_workers_permit_in_massachusetts.pdfIn PDF document text
- https://s3.amazonaws.com/xewamejixolefaj/daletabi.pdfIn PDF document text
- https://a2ae8793-a99f-480d-a3bc-849ef63d34f7.filesusr.com/ugd/cc207a_24a67e6cb3fc4fac8de6e461349d878e.pdf?index=trueIn PDF document text
- https://s3.amazonaws.com/zetubakuz/android_studio_rename_project_folder.pdfIn PDF document text
- https://s3.amazonaws.com/vufuzewasi/39114486173.pdfIn PDF document text
- https://0fc0baf9-b884-4fcd-968e-f93c0f938930.filesusr.com/ugd/68ec51_329015033087419687fa81ca8325e8c5.pdf?index=trueIn PDF document text
- https://ab2ac9d4-4772-4872-829d-c19fde0a4f90.filesusr.com/ugd/b919b3_e428d82b8b4c4081992b503f7b1279b9.pdf?index=trueIn PDF document text
- https://uploads.strikinglycdn.com/files/8f32fa80-423f-4b9f-896a-1e87beca8bf1/powershot_5700m_jammed.pdfIn PDF document text
- https://s3.amazonaws.com/metakibeme/craniocervical_junction_malformation_radiology.pdfIn PDF document text
- https://s3.amazonaws.com/lerezazo/89258750604.pdfIn PDF document text
- https://s3.amazonaws.com/fasudikek/90648129365.pdfIn PDF document text
- http://luxorofanogefa.rf.gd/bufiju.pdfIn PDF document text
- https://s3.amazonaws.com/begijufadi/jusuderomijekigowatetuvo.pdfIn PDF document text
- https://s3.amazonaws.com/kukupunopedon/41098643914.pdfIn PDF document text
- https://s3.amazonaws.com/xunilukegez/bissell_proheat_2x_revolution_pet_pro_walmart.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_off0000db26.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDB26	5268 bytes
SHA-256: `bfdde4d17cf29105cd4f34c824d4e18be85aa3d3d36ae4333399a6c093c0f53b`
`font_01_sfnt_off0000ecf5.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xECF5	11628 bytes
SHA-256: `a0d10e379061e9da3a427b280f5dcf924bd1259b784b2d021cae58265cbe2ec3`
`font_02_sfnt_off000112e3.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x112E3	4324 bytes
SHA-256: `a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f`

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