PDF malware analysis — malicious · eca03f189f3726de

MALICIOUS

PDF

88.9 KB Created: 2021-03-29 02:04:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24

MD5: 858566936c83129566ddeb5985d90902 SHA-1: 529f5dc0bbcdeb2bff43267551eca450e77debc4 SHA-256: eca03f189f3726de807adf75b7442cc2e3944e4147c2e48a42f208e01c750711

184 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains heuristics indicating it is a phishing lure and contains a mass of external links, one of which is a suspicious URL. The ML classifier and ClamAV also flagged this PDF as malicious. While no scripts were explicitly extracted, the PDF structure and heuristics suggest it's designed to lead the user to malicious content or facilitate further compromise.

Machine Learning

Nyx PDF Classifier malicious score 0.9982

Heuristics 7

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.
Callback phishing phone lure medium SE_CALLBACK_LURE

Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
Fake invoice / payment lure low SE_INVOICE_LURE

Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
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://soxebez.ru/wix?keyword=turning+point+blue+cross+blue+shield PDF link annotation
- http://jakitebalever.iblogger.org/limaditefedusanisu.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/tamobalasu/senetar.pdfIn PDF document text
- https://s3.amazonaws.com/xarojapi/bukipefokikosom.pdfIn PDF document text
- https://s3.amazonaws.com/vobuturinivi/35265651685.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/952f785c-4dce-4a79-96cd-8e60cca6726c/67718157703.pdfIn PDF document text
- https://s3.amazonaws.com/jotizifime/wituzuzu.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/038ba497-a8e9-4d8c-a5ea-29f985e41610/tewunepojibum.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/432b22a9-53cd-48ab-a8f9-df30acd20510/lefiri.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/4d20d586-f6ee-44be-8386-fdb214ac1493/how_to_use_hoover_fh50130.pdfIn PDF document text
- https://dcc20dec-0195-4543-b617-cfb82efd15f0.filesusr.com/ugd/30ea26_4f446be4872e49f0849ead92396d6247.pdf?index=trueIn PDF document text
- https://s3.amazonaws.com/wozoxub/confirmation_letter_of_employment_template.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/6502b8b9-f533-4424-84c1-780ff32e0705/xunojawasaxewelanew.pdfIn PDF document text
- https://s3.amazonaws.com/fulazelof/pemuvegiwoga.pdfIn PDF document text
- https://883cd1dc-02d0-4059-8fa2-99201f92b631.filesusr.com/ugd/6166c9_12c585e3ed024661ac49405316094fe4.pdf?index=trueIn PDF document text
- https://s3.amazonaws.com/baposivarabuj/free_pc_antivirus_2018.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/23b1219a-f100-440d-a3c3-2b79d339ea17/is_nesquik_strawberry_milk_good_for_you.pdfIn PDF document text
- https://s3.amazonaws.com/nevowimo/jinepid.pdfIn PDF document text
- https://cc4f1b1a-08c7-467e-bb5a-e3073ad8caf1.filesusr.com/ugd/ffc175_b494467602cc41dcb7a6465134c7554c.pdf?index=trueIn PDF document text
- https://uploads.strikinglycdn.com/files/0105bcda-652d-4054-b236-66295f87bb12/miwido.pdfIn PDF document text
- http://poravilotizeve.epizy.com/19030758959.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/189b5328-dbc9-4bb5-9ede-3e301567de61/72691033449.pdfIn PDF document text
- https://bef89f6e-6323-4b84-ad9d-a44490bfcc4f.filesusr.com/ugd/96768c_7b09bd3f197d465bb740bd8d3207c05b.pdf?index=trueIn PDF document text
- https://2a4b29e6-a790-453e-81e7-e8b9caf2c27b.filesusr.com/ugd/bf0735_ef1b5e1ab6c34332a552f80cd77c8c6e.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 4

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000e8f1.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE8F1	12548 bytes
SHA-256: `c1c699bfc7701c37d4ad487ce3d127030150d763274c059410a4e5c3dddd55b8`
`font_01_sfnt_off0001114d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1114D	5096 bytes
SHA-256: `92b729be574650cfd00f87db5734303acb8d7c2789be94d9892ef251334535fb`
`font_02_sfnt_off00012287.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12287	10672 bytes
SHA-256: `048ebbd000b8f9421f5edfe5671230ab206ad2d1bc7460655183cff9e5f12ef2`
`font_03_sfnt_off00014704.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x14704	4324 bytes
SHA-256: `05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176`

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