PDF malware analysis — malicious · 9aa540564a0ce78d

MALICIOUS

PDF

83.5 KB Created: 2021-05-22 03:26:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22

MD5: f35ac34ae79a501faaae237605d08291 SHA-1: a1518b5fe770751e9cad94aa505e6aa72d5e0c72 SHA-256: 9aa540564a0ce78d80a5c7ea287dba37acded956f1579ed905a0aeb16677305f

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains a large number of external links, many pointing to Weebly-hosted PDFs, suggesting a link farm or SEO manipulation tactic. One prominent URL, https://maypoin.ru/strik?utm_term=is+forthglade+dog+food+raw, is likely a malicious redirector. The document body is heavily obfuscated and unreadable, but the presence of embedded URLs and the PDF_SEO_LINK_FARM heuristic strongly indicate a malicious intent to direct users to potentially harmful content.

Machine Learning

Nyx PDF Classifier malicious score 0.9990

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://maypoin.ru/strik?utm_term=is+forthglade+dog+food+raw PDF link annotation
- https://zokolukesowi.weebly.com/uploads/1/3/0/7/130776120/forav_tekubogodaxexe_voferopox.pdfIn PDF document text
- https://nepuvojikonutoz.weebly.com/uploads/1/3/4/6/134677469/nadozuzito.pdfIn PDF document text
- https://vuwezamubom.weebly.com/uploads/1/3/0/8/130814902/51a2ee76d71ecb.pdfIn PDF document text
- https://gofadoden.weebly.com/uploads/1/3/4/6/134615513/6136446.pdfIn PDF document text
- https://kikizesojumare.weebly.com/uploads/1/3/4/7/134718780/1383634.pdfIn PDF document text
- https://dujililapute.weebly.com/uploads/1/3/5/3/135347223/wivumutelutinoj.pdfIn PDF document text
- https://pexafibilo.weebly.com/uploads/1/3/4/4/134484824/2304c30a8772c.pdfIn PDF document text
- https://sufupixugopibo.weebly.com/uploads/1/3/5/3/135316623/roduwiparerek_firezeposu_divujisodon_divus.pdfIn PDF document text
- https://kutijodokijo.weebly.com/uploads/1/3/4/7/134706590/davijafopas.pdfIn PDF document text
- https://kusejatakobex.weebly.com/uploads/1/3/1/4/131438299/8d59220f3dac2.pdfIn PDF document text
- https://vomerigovelaj.weebly.com/uploads/1/3/4/9/134901888/2c42492f.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/tupofelasujewas/1907789542.pdfIn PDF document text
- https://s3.amazonaws.com/faduxodiwo/what_is_hell_like_in_norse_mythology.pdfIn PDF document text
- https://s3.amazonaws.com/lomuper/cazadores_de_sombras_2013.pdfIn PDF document text
- https://s3.amazonaws.com/gidibesuxi/analyzing_microsatellite_data_worksheet.pdfIn PDF document text
- https://s3.amazonaws.com/xozeb/hp_laserjet_2100_windows_10_compatibility.pdfIn PDF document text
- https://s3.amazonaws.com/kefodek/cabo_bob_s_nutrition_information.pdfIn PDF document text
- https://s3.amazonaws.com/pizexopenaxu/early_effect_in_transistors.pdfIn PDF document text
- https://s3.amazonaws.com/xojafemori/diabetes_mellitus_guidelines.pdfIn PDF document text
- https://s3.amazonaws.com/xeroguru/13327962194.pdfIn PDF document text
- https://s3.amazonaws.com/vavejijitatofu/13772431460.pdfIn PDF document text
- https://s3.amazonaws.com/xumakomowi/godigigekaxudep.pdfIn PDF document text
- https://s3.amazonaws.com/zupenafud/textbook_of_anatomy_for_nurses_ashalatha_download.pdfIn PDF document text
- https://s3.amazonaws.com/mujevubutukoxu/veredu.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_off0000fc02.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFC02	4832 bytes
SHA-256: `ed90bd1215d204caae8fb862d677ac2bd42660283b80108bfa37732854d3df68`
`font_01_sfnt_off00010c8d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10C8D	11104 bytes
SHA-256: `efb792442c4e33553feec90fd7eda149969a95ddc016f3790b4ae4b55b470fd2`
`font_02_sfnt_off00013249.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x13249	4324 bytes
SHA-256: `b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c`

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