Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0aa1bf8308b5636…

MALICIOUS

PDF

82.6 KB Created: 2021-03-24 00:30:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: a71a37b76a1dd1a7a59951b357adda0d SHA-1: c6dbf4d2e64125a9f591c8a2b89c38428f507e8b SHA-256: e0aa1bf8308b5636af13592e16acc13f1a1f015188dd1f974ffb6474b4977213
246 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF file was flagged by multiple heuristics as malicious, including a critical finding for brand-impersonation credential phishing targeting Amazon. The document contains a large number of external links, many pointing to disposable hosting, suggesting a link farm designed to redirect users. The ML classifier also strongly indicated maliciousness. The primary attack pattern involves luring users with a fake "Amazon carding method" to click on malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 7

  • 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://bimefitovaj.weebly.com/uploads/1/3/1/4/131437299/botakizome-wigukuxem-zitatoja.pdf.
  • 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://baarspo.ru/award?keyword=amazon+carding+method+2020+pdf PDF link annotation
    • https://cdn.sqhk.co/surikuzezun/gPVxd1v/piano_tiles_2_free_online_games.pdfIn PDF document text
    • https://bimefitovaj.weebly.com/uploads/1/3/1/4/131437299/botakizome-wigukuxem-zitatoja.pdfIn PDF document text
    • https://cdn.sqhk.co/nuroteditu/eV4iaid/alien_arcade_game_rom.pdfIn PDF document text
    • http://itdiscount.pro/dictionary_skills_worksheet5g9vx.pdfIn PDF document text
    • http://aycotoro7.xyz/249072294773g95d.pdfIn PDF document text
    • https://cdn.sqhk.co/gavezexu/jaggKH1/timapevobawalarog.pdfIn PDF document text
    • https://gidepojijozi.weebly.com/uploads/1/3/4/2/134235950/zobojuret_fujanepoguxu_varumodo.pdfIn PDF document text
    • https://cdn.sqhk.co/vakanaju/JggcKie/corrugated_iron_sheet_standard_size.pdfIn PDF document text
    • http://topplafond.xyz/how_to_do_fractions_on_ti-84_cekqakt.pdfIn PDF document text
    • http://mavitrade.com/71161634758gyqf8.pdfIn PDF document text
    • https://nudozulewofofij.weebly.com/uploads/1/3/4/7/134711849/5734277.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://979cd01f-16ea-4d2c-b189-234964c95597.filesusr.com/ugd/d4c4cf_5bfc4e0ac24f4ccab52351d9f67cd958.pdf?index=trueIn PDF document text
    • https://76bf09fe-c378-4d6f-baa9-beaf48595a8b.filesusr.com/ugd/61567a_aefac75378e64b138a7e189f28a2c6ff.pdf?index=trueIn PDF document text
    • https://9a89a7da-ede3-42eb-a537-7416be21eb2d.filesusr.com/ugd/aaaf79_832783e20d994d8c81090acd30fef6b3.pdf?index=trueIn PDF document text
    • https://35479656-6a94-44d6-ac55-da507c14a2ae.filesusr.com/ugd/d68318_10375dae264f41dcb25d0118d15f37c2.pdf?index=trueIn PDF document text
    • https://3f46bf15-0a8c-4e80-b3e5-a2e3bf90e008.filesusr.com/ugd/8e6e76_d218c810d75e44cc9728cb1c8e2bef60.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/febopa/widolezetozinalenej.pdfIn PDF document text
    • https://s3.amazonaws.com/vofadoloves/bushnell_24mp_trophy_aggressor_low_glow_camo_trail_camera_reviews.pdfIn PDF document text
    • https://s3.amazonaws.com/kosipefojaw/practice_act_english_test.pdfIn PDF document text
    • https://b86313a8-447b-404d-ae6d-bc69740d899e.filesusr.com/ugd/e54fc7_1dd8c86d800947dfa852eefccc396254.pdf?index=trueIn PDF document text
    • https://387a498e-9551-4239-9507-3183ba214552.filesusr.com/ugd/cd403b_27757ab99ea846f4bf2e6d2f427fad3b.pdf?index=trueIn PDF document text
    • https://7f993087-45f6-41f4-96e5-9dcaca18fb91.filesusr.com/ugd/9a92dd_08eb60b3088a4b229a10829b43552a27.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wezukep/fomorijesira.pdfIn PDF document text
    • https://7404da97-7fcf-4d5f-9d5f-3f8644e6773a.filesusr.com/ugd/35f767_81f03a29199947948f49a51a057a2f10.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/pidufozu/what_is_the_name_of_simbas_kid.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_off000103d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103D5 5672 bytes
SHA-256: 208a72a19011220d7bced087a0ba386f262dba7777dea97fc5c61c78aa5199d8
font_01_sfnt_off000116fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116FB 11156 bytes
SHA-256: ea4948b36cc4fe491d6b6403dca6948ff8036aa52f62b9ef185cf2c1ac606264