PDF malware analysis — malicious · 282c8b27c8a57249

MALICIOUS

PDF

80.5 KB Created: 2021-03-21 10:13:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30

MD5: d71cbd45b89e99b2c682bdc72a2ffc54 SHA-1: ce7646cc8ecce4da69a131d1c5d3f413ce01863e SHA-256: 282c8b27c8a572498949a6f9a145a3648e842a5387bbb07d6f5702a4a7df7da5

126 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The sample is a PDF file flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, with at least two pointing to potentially malicious domains ('golowaki.ru' and 'fikakutipid.mygamesonline.org'). The PDF's structure suggests it functions as a link farm, directing users to external, potentially harmful content. No scripts were extracted, but the presence of multiple suspicious URLs indicates an attempt to redirect users to malicious sites.

Machine Learning

Nyx PDF Classifier malicious score 0.9996

Heuristics 5

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 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://golowaki.ru/strik?utm_term=blues+guitar+scales+for+beginners PDF link annotation
- http://fikakutipid.mygamesonline.org/meledajonotamu.pdfIn PDF document text
- http://trenketo.buzz/wukidotidikenezogesokumeaokoo.pdfIn PDF document text
- http://forpost-electrica.ru/97649298101zx36s.pdfIn PDF document text
- http://about-central.com/12553916771mqd60.pdfIn PDF document text
- http://gidonuvawugirid.medianewsonline.com/statistical_methods_in_educational_research.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- http://www.daltonmaag.com/In PDF document text
- https://uploads.strikinglycdn.com/files/24c8e704-5ffd-4678-a45c-54e145a67c60/jidirofazuruxovoxife.pdfIn PDF document text
- https://s3.amazonaws.com/luropiw/pojaliwazer.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/54864193-fbdb-4440-b9c7-467e57fd0cc9/xogirodelumeg.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/e955a9dc-5e1f-452a-9521-87070842bff3/why_wont_my_waterpik_charge.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/01992acb-3a46-49c2-a329-c4db6596b22f/25783119564.pdfIn PDF document text
- https://s3.amazonaws.com/gogoxowiniza/the_aeneid_robert_fagles_audiobook.pdfIn PDF document text
- https://s3.amazonaws.com/lazolu/formation_assistant_administratif_afpa.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/f1962594-8c5c-42d9-a16a-dece8b3295de/1356681204.pdfIn PDF document text
- https://s3.amazonaws.com/wobuzisibal/xiwelonezigaseb.pdfIn PDF document text
- https://s3.amazonaws.com/julexekubaj/kroger_blood_pressure_monitor_accuracy.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/89a8c294-1604-4689-929b-544c52ec32fb/31374185738.pdfIn PDF document text
- http://kuzemepusiloj.onlinewebshop.net/oxford_discover_grammar_4.pdfIn PDF document text
- http://pupagerirawax.myartsonline.com/gajizas.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/6a72266b-934d-4aa1-aa74-3a0cd1691c2f/dalufumexubevujorebamuga.pdfIn PDF document text
- https://s3.amazonaws.com/gaxuremewuger/fr._john_riccardo_christ_is_the_answer.pdfIn PDF document text
- https://s3.amazonaws.com/sevoga/linear_equation_problem_solving_with_answers.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 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000ede7.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEDE7	5120 bytes
SHA-256: `831a44e872ad9b1604c858137442a0532ab702c9e707e1377943f34c04376301`
`font_01_sfnt_off0000ff60.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFF60	10980 bytes
SHA-256: `9b656d3455cc6939dab08453bcfa96d0241eaed331a34e1f3008a631e601f577`
`font_02_sfnt_off000124d4.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x124D4	4324 bytes
SHA-256: `0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333`

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