PDF malware analysis — malicious · cb75bf17f7d2a53c

MALICIOUS

PDF

80.5 KB Created: 2021-04-11 12:09:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23

MD5: 058d6224afe48fa59271d1526e1dc413 SHA-1: 2d0e1c26f5c5a4560e705b8f7e88917fae45cabc SHA-256: cb75bf17f7d2a53c4c2cd1db44335e374e5f8d69184a99c97828707b998ede35

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 0.9967

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://druttle.ru/strik?utm_term=allen+bradley+1734-aentr+eds PDF link annotation
- https://cdn.sqhk.co/remimuroku/igCzhfq/50864559252.pdfIn PDF document text
- https://cdn.sqhk.co/duxisabaza/geeHQzE/virus_news_today_uk.pdfIn PDF document text
- https://cdn.sqhk.co/ratevusur/jdb83Sz/tupiderudowekowumoma.pdfIn PDF document text
- https://cdn.sqhk.co/tovipovo/2gjhfmN/cool_popular_ringtones_2020_top_100.pdfIn PDF document text
- https://cdn.sqhk.co/libuzewis/ie5Tkhg/na_remote_for_dune_hd_pro_apk.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- https://s3.amazonaws.com/rudelazifizuvo/vukab.pdfIn PDF document text
- https://bf5f3f24-cfb9-4aec-9f01-83e6d863dc5b.filesusr.com/ugd/1f4526_eac060d15de24792849e05749ee365a6.pdf?index=trueIn PDF document text
- https://s3.amazonaws.com/nasitevu/how_do_i_translate_chinese_symbols_to_english.pdfIn PDF document text
- https://69a21580-3c80-4f81-8097-1ec0bc18215d.filesusr.com/ugd/bd7df1_f6c4aa6770af43b68fd4a00bdb85074d.pdf?index=trueIn PDF document text
- https://c0cead0d-5248-483d-940e-95cc3acd9bde.filesusr.com/ugd/20d83a_31f4173ca07a420b933614f1e8500b81.pdf?index=trueIn PDF document text
- https://40785fcd-1e5e-4316-9306-5db1d5795eae.filesusr.com/ugd/2f07a1_d786beddf2144e2ea521ada7d7f7e009.pdf?index=trueIn PDF document text
- https://c1cb471f-fc5c-4ef2-b3e1-4d0d0d09d135.filesusr.com/ugd/cc5b41_4284a87adc364bce9da06f44d3cc2c2a.pdf?index=trueIn PDF document text
- https://e8802323-0824-40c5-8a58-19d700e27586.filesusr.com/ugd/50cafd_2a6d591f37014138b16ab5bbdbff21a4.pdf?index=trueIn PDF document text
- https://s3.amazonaws.com/nisoxow/enforceable_contract_template.pdfIn PDF document text
- https://70fbc5f3-53e4-4072-9ff7-a5862d19847b.filesusr.com/ugd/bb3bf9_2aaaf8c24fe144a7828d2f729a63dcfa.pdf?index=trueIn PDF document text
- https://9f503c4c-bf14-4dcb-9a7a-68e0e5bb3568.filesusr.com/ugd/8ac1ab_35401411fb5443c69f0b2c7620e5f46a.pdf?index=trueIn PDF document text
- https://s3.amazonaws.com/xazarujokemus/65636296163.pdfIn PDF document text
- https://s3.amazonaws.com/fowikorejodi/watajezekojut.pdfIn PDF document text
- https://s3.amazonaws.com/davolazupivowi/58042568745.pdfIn PDF document text
- https://s3.amazonaws.com/legenapi/nanodrop_2000_operating_software.pdfIn PDF document text
- https://041aa876-b65b-432c-96c0-58c8b295a4e4.filesusr.com/ugd/90d19e_bb67c014f8db4d20a0e92673469231d7.pdf?index=trueIn PDF document text
- https://1ceef7f3-d523-4f80-a0a4-3aed54d3d17a.filesusr.com/ugd/48841a_3aa8d2d550e242b9805a5ad6d5ec97f9.pdf?index=trueIn PDF document text
- https://1fae3a98-13b7-4b95-b1f0-1fbd1b7b0aee.filesusr.com/ugd/1da05d_4eb55b4207d74fcab73bbb7ccf02de2c.pdf?index=trueIn PDF document text
- https://ea64ff4c-51e6-4efc-8cc1-399682447901.filesusr.com/ugd/961f18_68717c1a2c384486bba8f27119754598.pdf?index=trueIn PDF document text
- https://s3.amazonaws.com/sebunuzu/job_requisition_form_template_word.pdfIn PDF document text
- https://13adc596-845f-4f4a-b539-e2c04a0a4b5a.filesusr.com/ugd/6e2da7_3e49ce5ce1bb45c1938d02d1270a3b20.pdf?index=trueIn 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_off0000fcc7.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFCC7	5468 bytes
SHA-256: `64d34b14ffa6596a3808af39b7ef92d46eb780b205d905c740017ec7a747e829`
`font_01_sfnt_off00010f85.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10F85	10844 bytes
SHA-256: `b1142bbfaf09e22fa6b00a0a0de10032f75854097c56f012e5dc0acbab6284e1`

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