PDF malware analysis — malicious · ef419d206a4375e2

MALICIOUS

PDF

76.5 KB Created: 2021-05-22 06:37:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23

MD5: b296dceb97dc2c812b72185009041f13 SHA-1: 93200ea278f252e0b8257b4539641daf921fe083 SHA-256: ef419d206a4375e2f0a1f0d674b58bc06d3bc2fc1012db83d0a061e6fc7a34b8

216 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses brand-impersonation credential phishing. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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.
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://bozuwosumexoxal.weebly.com/uploads/1/3/2/6/132682772/336786.pdf.
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://fokemale.ru/strik?utm_term=estructura+del+presente+perfecto+negativo+e+interrogativo PDF link annotation
- https://bozuwosumexoxal.weebly.com/uploads/1/3/2/6/132682772/336786.pdfIn PDF document text
- https://gewilowada.weebly.com/uploads/1/3/0/7/130776716/4311928.pdfIn PDF document text
- https://rugurujumififez.weebly.com/uploads/1/3/1/3/131384765/6624520.pdfIn PDF document text
- https://zekilunadaxidub.weebly.com/uploads/1/3/4/6/134631079/e08c407560022ef.pdfIn PDF document text
- https://noragunefide.weebly.com/uploads/1/3/1/6/131637841/tiranodiji.pdfIn PDF document text
- https://ponirusorigimo.weebly.com/uploads/1/3/0/7/130738629/980c06db867ba45.pdfIn PDF document text
- https://vagewojevibo.weebly.com/uploads/1/3/4/8/134873572/383427.pdfIn PDF document text
- https://tivagirususu.weebly.com/uploads/1/3/5/3/135350390/5402115.pdfIn PDF document text
- https://jozevupipe.weebly.com/uploads/1/3/5/3/135346753/zosatis.pdfIn PDF document text
- https://kurajefofukagi.weebly.com/uploads/1/3/4/8/134895289/7186628.pdfIn PDF document text
- https://nobakavukip.weebly.com/uploads/1/3/4/3/134373074/2232421.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- https://uploads.strikinglycdn.com/files/c0599624-c241-47dc-99ad-bd7d01de4970/what_year_did_bc_become_ad.pdfIn PDF document text
- https://s3.amazonaws.com/zuguvoxoki/cd_zeca_pagodinho_as_melhores.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/67aa61e3-d282-4d30-8b51-d50b9342e22e/nordic_track_exp_1000s_treadmill.pdfIn PDF document text
- https://s3.amazonaws.com/simujix/21308804182.pdfIn PDF document text
- https://s3.amazonaws.com/gewisetug/beiimaan_love_all_video_songs.pdfIn PDF document text
- https://s3.amazonaws.com/bezutu/femuxelixikarol.pdfIn PDF document text
- https://s3.amazonaws.com/wegugus/safokipunifot.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/9f2f795a-3990-4863-b5da-04d91737f5c0/motivum.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/8380073e-cff3-4ddb-abbe-e04e13ec523d/motorola_mc9090_manuale_italiano.pdfIn PDF document text
- https://s3.amazonaws.com/paxivogedewilu/30448693009.pdfIn PDF document text
- https://s3.amazonaws.com/vezumobigodub/32333792023.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/8cd2d1c4-a008-4c91-93a6-0d89404bb32a/xupubelexuxun.pdfIn PDF document text
- https://s3.amazonaws.com/dapekufoxiraku/23207386289.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_off0000ec60.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEC60	5340 bytes
SHA-256: `331259c179c91ea1b3f13093d962d03c691b970aa0bf0d4668568ecc7c9f4db8`
`font_01_sfnt_off0000fea7.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFEA7	11216 bytes
SHA-256: `1b17748fa2b7a65f22098cc03191d04fa243e7bd9c8cb397f134b2db8b18f13c`

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