PDF malware analysis — malicious · 18be4d3a14746b0d

MALICIOUS

PDF

74.2 KB Created: 2021-05-24 19:46:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22

MD5: 938b6e92d57c92a30b2e1307c0c1aad5 SHA-1: c658191a9da93084c775ec32712b1dd9b9b4a99d SHA-256: 18be4d3a14746b0d13abf849d5a67650842225f370daeea918f76bc20067d48f

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

Nyx PDF Classifier malicious score 0.9968

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://jumiwimov.ru/strik?utm_term=vigilar+y+castigar+pdf+gratis PDF link annotation
- https://static.s123-cdn-static.com/uploads/4388163/normal_6002373a55b61.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4402944/normal_60342bc52aa88.pdfIn PDF document text
- https://nugazemagutum.weebly.com/uploads/1/3/4/3/134346004/jejobi.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4481839/normal_60050308271b6.pdfIn PDF document text
- https://jebapawobukil.weebly.com/uploads/1/3/4/5/134521284/napimurafuzinina.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4485321/normal_6068954ad0542.pdfIn PDF document text
- https://taxirexojonub.weebly.com/uploads/1/3/4/7/134767272/gatirujulopizov-faxibe.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4421350/normal_602d3d2315fb9.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4422371/normal_606a8995adbc2.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4485821/normal_6027843f24fde.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4450145/normal_5ff7f67127dca.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4491965/normal_60661dd64f8a7.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://uploads.strikinglycdn.com/files/cbacb500-5cc7-47df-ba38-cfdf895531f5/60131531954.pdfIn PDF document text
- https://s3.amazonaws.com/najubu/life_of_galileo_brecht_summary.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/dc710664-421a-4fe5-abba-e07bffd897c2/can_you_play_music_through_parrot_ck3100.pdfIn PDF document text
- https://s3.amazonaws.com/dusubonifu/87194046388.pdfIn PDF document text
- https://s3.amazonaws.com/roware/woxifomedoviwufoxibi.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/c4913239-0049-4ca8-9fe1-4c195f9c61a3/swtor_patch_6.1.4c.pdfIn PDF document text
- https://s3.amazonaws.com/dabatisew/building_information_modelling_courses_singapore.pdfIn PDF document text
- https://s3.amazonaws.com/purufiz/jikazusa.pdfIn PDF document text
- https://s3.amazonaws.com/purufiz/judijevubovasenodologe.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/9f8f4988-0e75-4d74-813a-48581398ddf0/comparing_house_of_representatives_and_senate_worksheet.pdfIn PDF document text
- https://s3.amazonaws.com/kufazete/vesowexezamavawapafugasu.pdfIn PDF document text
- https://s3.amazonaws.com/xozeb/82378362857.pdfIn PDF document text
- https://s3.amazonaws.com/jemisajoda/gangster_games_android_1.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/d30938bf-1b08-44a7-b63d-943063b12a91/mepajew.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_off0000d652.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD652	4844 bytes
SHA-256: `9572b8b44310c729ee724293237d3d5934d96d63df8bb9f8ef9287f947a68145`
`font_01_sfnt_off0000e6e1.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE6E1	11228 bytes
SHA-256: `5ba53bd7a4afb41f1087bd230187d82c17835439d522fc431017e8a64eece045`
`font_02_sfnt_off00010b32.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10B32	4324 bytes
SHA-256: `a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f`

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