Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d2ea58faa2c4b3b…

MALICIOUS

PDF

77.6 KB Created: 2021-03-21 09:05:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 7dd05a01147f2366c45e4af7b0d679ac SHA-1: e2d78a328bf24331507acd90f1f1a2000db45947 SHA-256: 6d2ea58faa2c4b3bc787410f96f62d8e48bb00ce48751091da54e5097e60fee4
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains numerous external links, a technique often used in SEO manipulation or to redirect users to malicious sites. The heuristic PDF_SEO_LINK_FARM and PDF_SEO_DISPOSABLE_LINK_FARM indicate a large number of links pointing to potentially disposable domains. While no scripts were explicitly extracted, the ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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.
  • 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://jacksth.ru/wix?keyword=rooting+for+you+in+australia PDF link annotation
    • https://cdn.sqhk.co/wutalididow/bgcjfgd/car_price_calculator_quikr.pdfIn PDF document text
    • https://cdn.sqhk.co/nasubivapu/dcn5qgd/50127142906.pdfIn PDF document text
    • https://pufenenuboz.weebly.com/uploads/1/3/0/7/130738511/1821528.pdfIn PDF document text
    • https://cdn.sqhk.co/xovikojux/DrHfPjj/rise_up_game_app_download.pdfIn PDF document text
    • https://ladipepisosixas.weebly.com/uploads/1/3/4/8/134898905/6532914.pdfIn PDF document text
    • https://cdn.sqhk.co/guwuweri/jegggic/regency_theater_westminster_ca_movie_times.pdfIn PDF document text
    • https://vataripisak.weebly.com/uploads/1/3/4/6/134600115/mamotatawi.pdfIn PDF document text
    • http://botamasixijo.iblogger.org/82891685037.pdfIn PDF document text
    • https://fozufamegevavup.weebly.com/uploads/1/3/4/5/134586639/675537.pdfIn PDF document text
    • https://cdn.sqhk.co/bamosabubesi/t81haWC/free_music_download_for_iphone_8_plus.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/fotojipifuzitul/skripsi_sistem_informasi_akuntansi_keuangan_daerah.pdfIn PDF document text
    • https://234a0c07-d908-4261-bb83-16b3c96a9b04.filesusr.com/ugd/73e0e6_9ee160634ee04cc08204d004023d7aaa.pdf?index=trueIn PDF document text
    • https://04a9e765-cf69-4035-9b9a-998d8fb4e692.filesusr.com/ugd/8c5016_ac1dd0c90de1421599ced6a6d1d9e321.pdf?index=trueIn PDF document text
    • https://b8436764-02b3-4471-8711-1e8fed235cf0.filesusr.com/ugd/3b3fbb_a48ec5da9b2b4a5c91e4e9ab476a7a87.pdf?index=trueIn PDF document text
    • https://1094d5c0-a920-47c7-a1de-7e2d56a92d84.filesusr.com/ugd/47b1e8_721523805ca04074817741c425018ce9.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/bejeseja/amc_8_problems_art_of_problem_solving.pdfIn PDF document text
    • https://e1ca4115-fb55-43f9-84f1-eaf814f8c83f.filesusr.com/ugd/18122d_0514e6da066f4e61a248502bc397e3bb.pdf?index=trueIn PDF document text
    • https://769966b8-4adc-437e-bba8-f198cf6e171b.filesusr.com/ugd/41a0b6_ec2410fdd80e4706a0b31950eed39fc4.pdf?index=trueIn PDF document text
    • https://1cf095b7-1d29-4152-b82c-7733cf7ba0c7.filesusr.com/ugd/c1de29_d27e329b78ac4e52af3051aa8b5f6372.pdf?index=trueIn PDF document text
    • https://1a9cd40a-f0d6-44d4-a143-19288280ca2b.filesusr.com/ugd/7a13df_ce85cd1bf9bb401f87296d86bb946a94.pdf?index=trueIn PDF document text
    • http://wewiligeva.epizy.com/sony_a6500_lens_for_travel.pdfIn PDF document text
    • https://2ac56fc1-f7ee-4366-9cb2-1681469c68ee.filesusr.com/ugd/b914b5_b9e10f4260514f778091dc97d8354b92.pdf?index=trueIn PDF document text
    • https://e44de090-c64a-4a0f-b555-2784aa0ac37b.filesusr.com/ugd/41d583_5b14567ab88049919e76cf2b6a59637e.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/pisik/26541617357.pdfIn PDF document text
    • https://s3.amazonaws.com/wuwabobujasivor/c_programming_language_full_tutorial.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_off0000ef05.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF05 5044 bytes
SHA-256: 6f3f124ebace8e335927a028d43c48a48665e3ab9cae7991be7a311e9827ab8d
font_01_sfnt_off0001004e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1004E 11452 bytes
SHA-256: f1889e21e4f1d5dcb156aceece4c6bc07add980b67ac029f4984bec624b45872

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