PDF malware analysis — malicious · b3e221bdf6fcf596

MALICIOUS

PDF

75.5 KB Created: 2021-01-26 02:23:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15

MD5: b8701f55520003709fa11f7a6ebd9803 SHA-1: 285c2d678d1ba5c1906e44017f2ffcd31fe3ec3b SHA-256: b3e221bdf6fcf596df03ecb104fd26359460b18a9a2ad94a9a9946c63e7776f0

166 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains multiple links to external websites, including one that appears to be a link farm on disposable hosting. The document body, though heavily obfuscated, contains text related to 'Home depot anaheim hills' and 'wkhtmltopdf', suggesting a lure to disguise malicious links as search results or legitimate content. The presence of PDF_RANDOM_URL_LINK and PDF_SEO_DISPOSABLE_LINK_FARM heuristics indicates attempts to direct users to potentially harmful sites.

Machine Learning

Nyx PDF Classifier malicious score 0.9993

Heuristics 6

ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK

PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
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://leonvi.ru/123?utm_term=home+depot+anaheim+hills PDF link annotation
- http://detonicufficiale.website/fiperezivavirirox9hn0.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4372737/normal_5fda15c198f20.pdfIn PDF document text
- http://rejilif.iblogger.org/51239045062.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4425492/normal_5ff6b988e5185.pdfIn PDF document text
- https://cdn.sqhk.co/dunenilufa/hghhiSK/top_pop_music_2020_clean.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4425256/normal_5fd0471fee95c.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4448744/normal_5fe10272e1df6.pdfIn PDF document text
- http://gatorama.space/denudipivovowepebagisajobqubmh.pdfIn PDF document text
- https://cdn.sqhk.co/zupitefa/gfJ5IT1/kogama_christmas_parkour_unblocked.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4404965/normal_5fe6192042023.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4476282/normal_600e22b74fb27.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4450731/normal_600e222b5743e.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4365589/normal_5fe44fc600a13.pdfIn PDF document text
- http://torchqbfl.fun/my_account_etisalat_egyptuv7hs.pdfIn PDF document text
- https://cdn.sqhk.co/motakolilo/SLhjhf4/paycell_haz_r_limit_artt_rma.pdfIn PDF document text
- http://faguduni.22web.org/45857235603.pdfIn PDF document text
- http://granitmetrospecstroy.ru/app_assistant_apk_downloadlnyf4.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/telasebisu/calendar_template_august_2019_word.pdfIn PDF document text
- http://demunoj.epizy.com/project_report_on_cyclotron_for_class_12.pdfIn PDF document text
- https://s3.amazonaws.com/vinivuxo/xarawimedejowibesasam.pdfIn PDF document text
- http://poziluxolebulu.epizy.com/bones_episode_guide_season_11.pdfIn PDF document text
- https://s3.amazonaws.com/gomaxod/isaiah_rashad_grace_free.pdfIn PDF document text
- http://gasigigi.rf.gd/converting_area_units_worksheet.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_off0000e9bf.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE9BF	5064 bytes
SHA-256: `768163e659ef6d1de33bac4d18f9cec67f386097c380cfafd4b3af0b5556b732`
`font_01_sfnt_off0000facc.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFACC	11240 bytes
SHA-256: `93368f4a3ec095fec6a367101b0f4cb3e2d237d051ed7001b9a314f0b8490d53`

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