PDF malware analysis — malicious · 1604dd3e5d33b687

MALICIOUS

PDF

78.1 KB Created: 2021-04-05 04:13:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10

MD5: 78c452f020632099f6fc3b6ad05cde72 SHA-1: ec1a5b66bbbddbab50d4c3a467b1a68631d3dcae SHA-256: 1604dd3e5d33b6877b238e0d57267716e8a87a1cb6a9464339b22f98e80ad39e

216 Risk Score

Malware Insights

MITRE ATT&CK

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

The file was detected as malicious by ClamAV and an ML classifier, and heuristics indicate it is a credential phishing lure impersonating Outlook. The PDF contains numerous external links, including one pointing to a redirector URL that likely leads to a malicious payload. While no scripts were explicitly extracted, the PDF structure and heuristic firings strongly suggest exploitation and phishing as the primary attack vectors.

Machine Learning

Nyx PDF Classifier malicious score 0.9992

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://wesonibisizigoj.weebly.com/uploads/1/3/0/9/130969529/3b86b5e.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://bologen.ru/wix?keyword=animal+farm+propaganda+worksheet+answers PDF link annotation
- http://javiwovaxaduza.22web.org/begin_the_beguine_piano_sheet_music.pdfIn PDF document text
- https://wesonibisizigoj.weebly.com/uploads/1/3/0/9/130969529/3b86b5e.pdfIn PDF document text
- https://voxonased.weebly.com/uploads/1/3/1/4/131407877/efd587402.pdfIn PDF document text
- https://lurusinobafor.weebly.com/uploads/1/3/2/7/132710654/e60a7a7691.pdfIn PDF document text
- https://wivusogonelom.weebly.com/uploads/1/3/5/3/135310870/xepar.pdfIn PDF document text
- https://vaxudiku.weebly.com/uploads/1/3/4/7/134709892/poxolimog.pdfIn PDF document text
- http://baderezu.scienceontheweb.net/aurangabad_smart_city_bus_timetable.pdfIn PDF document text
- http://risejesifisem.22web.org/dlink_dir_615_manual.pdfIn PDF document text
- http://xanejog.medianewsonline.com/gukevew.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/xesigeze/fe_exam_waiver_california.pdfIn PDF document text
- https://s3.amazonaws.com/feseni/percy_jackson_movie_cast_and_crew.pdfIn PDF document text
- https://s3.amazonaws.com/midipes/best_non_conforming_golf_balls_2019.pdfIn PDF document text
- https://s3.amazonaws.com/gagagakigibapo/boilers_types_characteristics_and_functions.pdfIn PDF document text
- http://tinasixubu.epizy.com/aviation_safety_program.pdfIn PDF document text
- http://juborekif.atwebpages.com/zisajeguwas.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/436755a0-3588-4668-b0fe-fda0b7c8a340/41984668415.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/a139aa99-bf1e-4449-8156-cdea5cb05bd4/masterbuilt_electric_smoker_temperature_settings.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/f50f8b6b-ba3d-4c63-aa1c-5702c8786a93/91340668192.pdfIn PDF document text
- https://s3.amazonaws.com/tutapaxi/jafivas.pdfIn PDF document text
- http://meganabinas.rf.gd/lease_agreement_california.pdfIn PDF document text
- http://zubimox.rf.gd/52099105638.pdfIn PDF document text
- http://sogurorirerew.onlinewebshop.net/bitonic_sorting_network.pdfIn PDF document text
- https://s3.amazonaws.com/belapawerezuju/fitusov.pdfIn PDF document text
- https://s3.amazonaws.com/kumasala/32860241216.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_off0000f1af.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF1AF	5600 bytes
SHA-256: `ee74f3d1ae8d52c2a6600051442a39d335d78c302bbad1dcea2d60c2cf4b2c10`
`font_01_sfnt_off000104a0.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x104A0	11244 bytes
SHA-256: `f9f38bc2e19b33770ded9ec37d3f70503ca785b3a860191690579fc1bc2d83be`

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