PDF malware analysis — malicious · 2f14dabffa92e438

MALICIOUS

PDF

81.7 KB Created: 2021-06-12 12:21:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25

MD5: 476c8fbf2225b2f77d0c4d055aee0d5e SHA-1: 5212b8eb173f87aac9bee40349b95c9c60580423 SHA-256: 2f14dabffa92e438ccaea2795b903f775b5af62232ba0d973f70d525536fff32

216 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF file was flagged by multiple heuristics as malicious, including brand impersonation for credential phishing (Apple) and a link farm. The ML classifier and ClamAV also identified it as malicious. The presence of external URIs suggests an attempt to redirect the user to malicious sites, likely to download further payloads or steal credentials.

Machine Learning

Nyx PDF Classifier malicious score 0.9992

Heuristics 6

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.
Brand-impersonation credential phishing lure critical SE_BRAND_CREDENTIAL_PHISH

Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: action link to abused redirector https://jurusaxigudovof.weebly.com/uploads/1/3/4/3/134341302/9854854.pdf.
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/123?utm_term=absorption+costing+questions+and+answers+pdf PDF link annotation
- https://static.s123-cdn-static.com/uploads/4386613/normal_6000cc0680aaa.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4447669/normal_5fce6b7281873.pdfIn PDF document text
- https://jurusaxigudovof.weebly.com/uploads/1/3/4/3/134341302/9854854.pdfIn PDF document text
- https://xavebebojemap.weebly.com/uploads/1/3/4/8/134848852/jatezite.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4366661/normal_6067132141210.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4496381/normal_606179ecc3e73.pdfIn PDF document text
- https://bawidonawasaz.weebly.com/uploads/1/3/4/3/134354070/nefuzenatexetixapota.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4495846/normal_6049766939424.pdfIn PDF document text
- https://static.s123-cdn-static-d.com/uploads/4366987/normal_60aff88696c97.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4405208/normal_5fe39fb06dfa9.pdfIn PDF document text
- https://static.s123-cdn-static-d.com/uploads/4494889/normal_60b000252c21a.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/c68b48fe-23ed-4596-a990-f33f8c618207/ribalowulesodapilimujesu.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/9ea65c53-7ba1-4b28-bb31-44dc6c8bc348/singer_stylist_7258_bobbin_size.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/7750cfe8-3623-4599-8d08-124956e1b456/vuvabutozitolerebasoses.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/92dafe56-5664-49d1-83b9-17f9e424dd99/93995465275.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/5e56416f-1c88-4bf8-b3c0-53489082965d/how_to_configure_apple_airport_express_1st_generation.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/9bd87531-3cfa-4ac3-b609-3ddb6dcddee0/hp_envy_7640_printer_not_responding.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/df923c86-bc1c-40e7-bf07-e7ae5cd5905d/crows_zero_2_full_movie_eng_sub_free_watch.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/003c8fa8-525c-4abe-94b5-63617667b42d/canada_high_demand_occupation_list_2020.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/63e40d12-33c8-482f-bab0-e9d9d14f442e/dwarf_fortress_guide_to_adventure_mode.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/27f21a23-baa3-4bcc-83c9-7210261da76e/pokesowasulibunevid.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/3093ef77-b76e-48c9-8db6-785232c7bcdc/guxul.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/bd1619e2-a0b8-4ad8-aaa5-ca667c0c050c/project_management_tool_software_definition.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_off0000f060.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF060	5520 bytes
SHA-256: `72285b8f07f48a656c6b4d01e8d9f2f572bf62dbae6f921df5f985ce876c6b37`
`font_01_sfnt_off0001032f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1032F	11748 bytes
SHA-256: `4e99ce38fe6de9cfd2dcb9ba429c65f3c79e5b636acb0698a7bd301dc0ab6266`
`font_02_sfnt_off00012af0.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12AF0	4324 bytes
SHA-256: `05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176`

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