PDF malware analysis — malicious · 684c682288486ec7

MALICIOUS

PDF

74.2 KB Created: 2021-03-20 01:07:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21

MD5: 520da2c34f9be56dad23f1548a11e7a9 SHA-1: 4f1bd8d8f2ca753b26347aad3e802c32945f5554 SHA-256: 684c682288486ec7f9030512a2ecf97a027d3622caca123a56ba1910c4fc5ccc

166 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

This PDF document was flagged by a machine learning classifier and ClamAV as malicious, exhibiting characteristics of a phishing or trojan delivery mechanism. The heuristic 'SE_FAKE_CAPTCHA' indicates the document presents a fake verification prompt to deceive the user, likely to trigger an exploit or download a secondary payload. The numerous external URLs suggest a link farm designed to host or redirect to malicious content.

Machine Learning

Nyx PDF Classifier malicious score 0.9993

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
Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA

Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
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://botokaw.ru/award?keyword=laporan+kasus+bronkopneumonia+pada+anak+pdf PDF link annotation
- https://static.s123-cdn-static.com/uploads/4465690/normal_5fe417026e654.pdfIn PDF document text
- https://monaxakapivelor.weebly.com/uploads/1/3/1/1/131164425/784263.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4366381/normal_5fc6915cb5714.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4485015/normal_6048e2097df10.pdfIn PDF document text
- https://lozoliso.weebly.com/uploads/1/3/4/7/134775557/wexapuzebaxiruketum.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4468255/normal_6011655f7b3b1.pdfIn PDF document text
- https://cdn.sqhk.co/fofodafexadu/aDieiid/wakofowiferukus.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4377380/normal_600a5269529ba.pdfIn PDF document text
- https://cdn.sqhk.co/bulunazi/hhiauI6/pac_man_fever_game.pdfIn PDF document text
- https://bizitaninajoki.weebly.com/uploads/1/3/5/3/135316521/toruwog-zesusarapalaw-mivazimu.pdfIn PDF document text
- https://cdn.sqhk.co/zabitokepum/ziazhg9/screen_recorder_with_audio_from_headphones_iphone.pdfIn PDF document text
- https://naruvoraxosu.weebly.com/uploads/1/3/0/8/130873998/lidekaki_bagaleve_vovagaxom_komukomu.pdfIn PDF document text
- https://jajaleregonu.weebly.com/uploads/1/3/4/2/134235513/3129980.pdfIn PDF document text
- https://nozezezolakufu.weebly.com/uploads/1/3/2/6/132695232/c73a31c5.pdfIn PDF document text
- https://cdn.sqhk.co/tajudozizif/fCOgdia/zeds_dead_jersey.pdfIn PDF document text
- https://lefamadagizid.weebly.com/uploads/1/3/4/7/134704745/votokazibita.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/mipizaju/31232481721.pdfIn PDF document text
- https://s3.amazonaws.com/wizomoravazub/marimixoket.pdfIn PDF document text
- https://s3.amazonaws.com/lorifawuvawot/44215018514.pdfIn PDF document text
- http://dapuvutajula.rf.gd/76968322760.pdfIn PDF document text
- https://s3.amazonaws.com/poguvelefa/algorithms_for_optimization_the_mit_press.pdfIn PDF document text
- http://luvewon.epizy.com/dizukiripaxonebuti.pdfIn PDF document text
- https://s3.amazonaws.com/wusigipufuvowix/mzansi_afro_pop_beats.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_off0000e627.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE627	5300 bytes
SHA-256: `d06e7fcd56e752323b18da3791fb62f561fa69a4f51c311c8400382b96acf91d`
`font_01_sfnt_off0000f815.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF815	10236 bytes
SHA-256: `aaa58dc4ed1cd0b9e89234723b2f1b91235dda227753d76f5b4360389f41b9e8`

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