PDF malware analysis — malicious · ecab7f0a1dad7bec

MALICIOUS

PDF

72.8 KB Created: 2021-02-11 23:58:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14

MD5: e78bc0ebb5692cebce267ad2a292f138 SHA-1: 2627a82c262668e00688ddb9feb1e404c92d2525 SHA-256: ecab7f0a1dad7bec81cac0d5eec1d9f15405905b0c3fc00ee359d5f339dd675f

244 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains a significant number of embedded URLs, with heuristics indicating a link farm designed to redirect users to potentially malicious sites. The presence of a known malicious redirector URL and the ML classifier's high confidence score strongly suggest a phishing or scam campaign. No scripts were extracted, but the overall structure points to a malicious document intended to lure users to external sites.

Machine Learning

Nyx PDF Classifier malicious score 0.9998

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
PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK

PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
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.
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://crophysi.ru/123?utm_term=arcata+animal+hospital+reviews In PDF document text
- https://cdn.sqhk.co/wugolekufo/bZ0jboJ/bojibemidozuxajin.pdfIn PDF document text
- http://helplnstagramcontact6088758.com/5e_fighter_cavalier_guide5beaa.pdfIn PDF document text
- https://cdn.sqhk.co/somujatiza/ie3jjDp/geometry_dash_world_for_pc.pdfIn PDF document text
- https://cdn.sqhk.co/karadirimose/gjijehi/23835901664.pdfIn PDF document text
- https://cdn.sqhk.co/jaxugaveg/S9iigfN/mobile_phone_fixing_store_cell_repair_mechanic_brooklyn.pdfIn PDF document text
- https://cdn.sqhk.co/bapuwanuvadi/cKOf0gh/wujinu.pdfIn PDF document text
- http://nanewak.iblogger.org/adobe_reader_merge.pdfIn PDF document text
- https://cdn.sqhk.co/daposofoxig/HsiaChg/kontra_k_songs_lyrics.pdfIn PDF document text
- https://mevavenepid.weebly.com/uploads/1/3/1/6/131637679/6075377.pdfIn PDF document text
- http://segway-wheelchair.ru/8295727795qaf3w.pdfIn PDF document text
- http://potenciy.xyz/bosch_microwave_drawer_hmd8451uc_manual0tpjt.pdfIn PDF document text
- http://deteluwo.iblogger.org/appvn_apk_7._0a.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/robumuduluwise/dermatite_acneiforme_o_que.pdfIn PDF document text
- http://suvumudupese.epizy.com/chrome_browser_version_42_and_above.pdfIn PDF document text
- https://s3.amazonaws.com/jivala/govajedow.pdfIn PDF document text
- http://fixiwerasame.rf.gd/roloketu.pdfIn PDF document text
- https://s3.amazonaws.com/xipavir/lacoste_men_s_size_guide.pdfIn PDF document text
- https://s3.amazonaws.com/zibenoroduzuw/ff14_ultima_weapon_ultimate_guide.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
- http://dejavu.sourceforge.netIn PDF document text
- http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000c9cf.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xC9CF	5316 bytes
SHA-256: `c46f18b055fec31ac47c2160e3f8565ce65eaed550b7f104f56e711781cc7b3e`
`font_01_sfnt_off0000dbc6.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDBC6	11224 bytes
SHA-256: `ac7bf27b1305f8187c5863ab58470883fcd43c42d87a3d864c068087604f899d`
`font_02_sfnt_off000100c2.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x100C2	16204 bytes
SHA-256: `e93acd332f5893643511f4cefd38969ad5c744ad1b08842a788b6be7d277dd15`

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