PDF malware analysis — malicious · 1de15f4b809cf7ae

MALICIOUS

PDF

75.3 KB Created: 2021-03-17 14:53:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-13

MD5: 94a6f53997461f1fe0812cddc245601a SHA-1: c852e0e6044b553352b5ba2406d865a45dacf7b2 SHA-256: 1de15f4b809cf7aec9b635afa13e5edfbd6c794193b15daa6333e7fbc6f138da

126 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains embedded URLs pointing to suspicious domains, including one that appears to be a link farm designed for SEO manipulation. The document body, though heavily obfuscated, contains text related to 'presentation rubric' and a URL that matches one of the extracted IOCs, suggesting a lure to a malicious site.

Machine Learning

Nyx PDF Classifier malicious score 0.9993

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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM

Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
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://midufefew.ru/award?keyword=presentation+rubric+middle+school+pdf PDF link annotation
- http://jivusibofonefud.mygamesonline.org/where_is_the_battery_on_a_dodge_avenger.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4370051/normal_603e041f80197.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4420910/normal_602f20d84aeb0.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4459185/normal_600da8841b0f6.pdfIn PDF document text
- http://kowojolajamuv.getenjoyment.net/how_to_use_code_breaker_cheats.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4370097/normal_5fe7843a9a021.pdfIn PDF document text
- http://pewujok.mypressonline.com/alcoholics_anonymous_big_book_fourth_edition.pdfIn PDF document text
- http://latitekiwa.scienceontheweb.net/an_inspector_calls_full_text.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4481699/normal_60086c27415d5.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- https://6d1a2d78-ebd2-4140-94a0-411197be5b5f.filesusr.com/ugd/88ff89_128bd65f68464ddaa55b94faf1556736.pdf?index=trueIn PDF document text
- https://59b17237-83b3-47c6-9d40-f547da5b0434.filesusr.com/ugd/827194_d0905d40d84947fa969bc619378eb8c5.pdf?index=trueIn PDF document text
- https://s3.amazonaws.com/vonutavekip/jkbose_10th_date_sheet_2019_private_kashmir.pdfIn PDF document text
- http://todibosopif.epizy.com/28328934708.pdfIn PDF document text
- https://s3.amazonaws.com/sosupejuxofedo/marodosobezag.pdfIn PDF document text
- http://nezopodadas.epizy.com/65206134647.pdfIn PDF document text
- https://cae2aa39-5014-47ec-b549-0fed73f36d02.filesusr.com/ugd/c8683e_7f47b7761ad54038a771c08d15a04799.pdf?index=trueIn PDF document text
- https://3f735f5a-cd1c-4288-bd93-adeff6e084d9.filesusr.com/ugd/bcc0e4_9ca32d4ab8ae456f8b3d7633e2a7ed53.pdf?index=trueIn PDF document text
- http://ridurosumebo.epizy.com/22011983645.pdfIn PDF document text
- https://a4346b84-4611-49ab-b113-80c9188ca613.filesusr.com/ugd/078c79_47e8a1d50c0a44299d12e460de4dd3ea.pdf?index=trueIn PDF document text
- https://s3.amazonaws.com/nedijowewoded/metalulatimepevazipux.pdfIn PDF document text
- https://9d50af6f-dbf7-41ba-b854-83985329a12b.filesusr.com/ugd/33c377_e9f833f1dd82420da7071849d0b500d3.pdf?index=trueIn PDF document text
- https://4993f9ff-345c-4c03-a8ec-d4f8dac664d6.filesusr.com/ugd/debbe1_bddc744177054dc28a931fa0150ec98c.pdf?index=trueIn PDF document text
- https://s3.amazonaws.com/poguvelefa/60536831969.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_off0000e8c8.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE8C8	5536 bytes
SHA-256: `8c94fe292cb2b1948aa046607e06188b16fc4515ad1235f8f29d9b61d5c9acaf`
`font_01_sfnt_off0000fb66.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFB66	10540 bytes
SHA-256: `6a2cdd44472417900d88525c5cc6085dd164cf7e99455660ccbe196ac89cf9a3`

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