Malicious PDF — malware analysis report

Static analysis result for SHA-256 1b6b50d3ef937068…

MALICIOUS

PDF

77.9 KB Created: 2021-03-22 22:27:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: f6167a8d6ca3415e94bade9818f6bcc8 SHA-1: 572a089d58dc018a7fc98dc932041461c4cad65e SHA-256: 1b6b50d3ef937068606648a51b8227fddebcc31b9751a1be8df2e5a55890aaf0
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9998

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://fokemale.ru/wix?keyword=ccg+price+guide PDF link annotation
    • http://zawugudumi.getenjoyment.net/mufiwemurukizegit.pdfIn PDF document text
    • http://sberetransfer.online/anatomy_and_physiology_notesknqzh.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478141/normal_603b7a4a89d0c.pdfIn PDF document text
    • http://magic-spring.com/how_to_charge_a_duralast_jump_starter_900eap42.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475988/normal_5fc726478e8a5.pdfIn PDF document text
    • http://scriptbook.xyz/568450033829spq3.pdfIn PDF document text
    • http://lovemecompletely.com/download_game_stickman_clash_mod_apk_android_1omxvy.pdfIn PDF document text
    • http://zutolewe.mywebcommunity.org/how_to_install_chamberlain_keyless_entry.pdfIn PDF document text
    • http://oneitstore.pro/timiporogoguriputvtx0.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://4c72699b-aa2e-4dc8-8bd5-1a54e8f938a6.filesusr.com/ugd/f3cb45_17197a715bef46659256a7b4c4f2396f.pdf?index=trueIn PDF document text
    • http://padegijogul.atwebpages.com/19727990057.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7ba9c968-cd63-4967-b891-3d5fd94dd1d6/mercruiser_3.0_liter_engine_parts.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8390415d-0e04-463f-9af9-b2530bad3394/gujenorawizixe.pdfIn PDF document text
    • https://3176e400-c268-4dc0-8d69-08eae86937f8.filesusr.com/ugd/ea2f88_232dfdf9d84842cda3a6608dcc053b31.pdf?index=trueIn PDF document text
    • https://fbaba6ab-37cf-477f-82bd-e10a416eccda.filesusr.com/ugd/3c8574_fad9fee40b6145dc85802bc66401f3fa.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/5fff5cba-7b86-4768-a731-aafbb85cc994/cliff_swallow_or_barn_swallow.pdfIn PDF document text
    • https://d67926d6-99fe-48a4-938f-95006fdf2de6.filesusr.com/ugd/21d82e_6b58d5d5621c4e9cafd5eb50f5957f94.pdf?index=trueIn PDF document text
    • https://85fc0914-20e3-4f1c-be8c-de7e6f89f47e.filesusr.com/ugd/a44510_7cf0f259fee9475eb3972418d1efbc3b.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/52f3a4a8-7efb-4925-9fd4-ba2021129413/asus_q502la-bbi5t12_battery_replacement.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.

FilenameKindSourceSize
font_00_sfnt_off0000f50f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF50F 4728 bytes
SHA-256: 7c3669565a2ac242bfe9dfb62c3ba698c57ef20f822b2bc93feb00619faa5769
font_01_sfnt_off00010532.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10532 10972 bytes
SHA-256: bfb13223fdcf781513f3a07a57d0b6840b41cabf7385610be516888bd826535e

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