PDF malware analysis — malicious · a77c3dd6146092c4

MALICIOUS

PDF

77.1 KB Created: 2021-05-14 14:43:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24

MD5: f6e1bea303ff2cee5e4da568eec19341 SHA-1: 69e9b67bb83516b9e799e9ecb5ca14d908cbc84f SHA-256: a77c3dd6146092c4c741289aef3b55d2bd70b3aabfecad187637fc5f87ff1d65

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains numerous external links, a technique often used in SEO poisoning or phishing campaigns to direct users to malicious sites. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and extensive link farm suggest an attempt to exploit users through external resources.

Machine Learning

Nyx PDF Classifier malicious score 0.9952

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://jacksth.ru/strik?utm_term=is+there+a+reset+button+on+a+goodman+heat+pump PDF link annotation
- https://doxavigefixo.weebly.com/uploads/1/3/5/3/135391607/dodovopiraloguj-zumerekufemita-wejomunex.pdfIn PDF document text
- https://sozezitevi.weebly.com/uploads/1/3/4/6/134639304/b39bc.pdfIn PDF document text
- https://vewomovo.weebly.com/uploads/1/3/1/8/131871781/7c568b66c6.pdfIn PDF document text
- https://sutuvawubu.weebly.com/uploads/1/3/6/0/136055635/a66c5c2.pdfIn PDF document text
- http://loxesitigogu.iblogger.org/jubeberatuzunasojomipu.pdfIn PDF document text
- https://xafukulirodut.weebly.com/uploads/1/3/1/3/131379356/7734941.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- https://add83a7c-0e31-48b3-928b-061d82ba9144.filesusr.com/ugd/205ae4_152fc1d849b84878a062c2aaf9bd2d29.pdf?index=trueIn PDF document text
- https://5e54d98c-4257-4cc7-9010-48f3df296eb2.filesusr.com/ugd/05240c_fea1254540e14193b0ee3d15cb4094bb.pdf?index=trueIn PDF document text
- https://s3.amazonaws.com/zobuwubedak/buxodibaxazugele.pdfIn PDF document text
- http://wikatefa.epizy.com/53676896191.pdfIn PDF document text
- https://s3.amazonaws.com/tikofaketonub/does_blue_bell_ice_cream_contain_carrageenan.pdfIn PDF document text
- https://011f98f8-b45f-4578-a2fd-466b530f7845.filesusr.com/ugd/74e905_19ef596d8c134ed8a8f806f140b7cf20.pdf?index=trueIn PDF document text
- https://s3.amazonaws.com/xutomoxu/satadejidimaz.pdfIn PDF document text
- https://s3.amazonaws.com/penefelomiju/cognos_reporting_tool_latest_version.pdfIn PDF document text
- https://s3.amazonaws.com/dafumuxitupav/32416349540.pdfIn PDF document text
- https://s3.amazonaws.com/wetowuzuxit/bell_jar_definition_and_function.pdfIn PDF document text
- https://s3.amazonaws.com/kifutizijebuj/36286519601.pdfIn PDF document text
- http://nakuwoxadi.epizy.com/geometry_complementary_and_supplementary_angles_worksheet.pdfIn PDF document text
- https://s3.amazonaws.com/sirilagewuga/lesuwoke.pdfIn PDF document text
- https://s3.amazonaws.com/jifesu/55993154569.pdfIn PDF document text
- https://s3.amazonaws.com/fuwenoxuzasila/arnold_chiari_malformation_symptoms_in_adults.pdfIn PDF document text
- https://s3.amazonaws.com/minaxigevani/22113651701.pdfIn PDF document text
- https://s3.amazonaws.com/figugipopar/princess_diaries_2_full_movie_watch_online_with_english_subtitles.pdfIn PDF document text
- https://s3.amazonaws.com/xifabilejilab/sony_trinitron_standby_light_flashing_4_times.pdfIn PDF document text
- https://5e6d3f51-9b35-4a29-baf4-1f036254a461.filesusr.com/ugd/99a8f2_8e9a449095024d59893441f0d93239e5.pdf?index=trueIn PDF document text
- https://s3.amazonaws.com/pazovugal/hanuman_wallpaper_2018.pdfIn PDF document text
- https://s3.amazonaws.com/kalanejaxutilif/76281479690.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 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000ef5e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEF5E	5416 bytes
SHA-256: `c5d673444872e4b9f913abf484baf0e025216abe7c82ac2938f40e3240af4ea9`
`font_01_sfnt_off00010198.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10198	10728 bytes
SHA-256: `cdc13a72008e191103e60bb60df640706d82c8d4ae33ddcbbe12fc9f45556d1e`

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